MVT: Generate metadata.json with copyright and timing information.

So the information can be exposed to the webmap's info dialog.

5 files changed, 470 insertions, 92 deletions

diff --git a/common.py b/common.py
index 0035160..0859ef0 100644
--- a/common.py
+++ b/common.py
@@ -19,7 +19,7 @@
 # pylint: disable=missing-module-docstring
 
 import os
-from os import path as os_path, curdir as os_curdir
+from os import path as os_path, curdir as os_curdir, pardir as os_pardir, sep as os_sep
 import sys
 from fnmatch import fnmatchcase
 from pathlib import Path, PosixPath
@@ -151,6 +151,64 @@ def parse_config(path : Optional[Path] = None,
 
     return config
 
+def _check_key_type(k : str, v : str, known_keys : list[type, tuple[set[str]]]) -> bool:
+    for t, ks in known_keys:
+        if k in ks and isinstance(v, t):
+            return True
+    return False
+
+def parse_config_dl(downloads) -> dict[str, dict[str, str|int]]:
+    """Parse and validate the "downloads" section from the configuration dictionary"""
+
+    if not isinstance(downloads, list):
+        raise BadConfiguration(f'Invalid download recipe: {downloads}')
+
+    known_keys = [
+        (str, {'path', 'url'}),
+        (int, {'max-age', 'max-size'}),
+    ]
+
+    destinations = {}
+    known_keys_set = {k for _,ks in known_keys for k in ks}
+    for dl in downloads:
+        if 'url' in dl:
+            dls = [dl]
+        elif 'basedir' in dl and 'baseurl' in dl and 'files' in dl and 'path' not in dl:
+            dls = []
+            for filename in dl['files']:
+                dl2 = {
+                    'path' : os_path.join(dl['basedir'], filename),
+                    'url' : dl['baseurl'] + filename
+                }
+                for k, v in dl.items():
+                    if k not in ('basedir', 'baseurl', 'files'):
+                        dl2[k] = v
+                dls.append(dl2)
+        else:
+            raise BadConfiguration(f'Invalid download recipe: {dl}')
+
+        for dl in dls:
+            path = dl.get('path', None)
+            if path is None or path in ('', os_curdir, os_pardir) or path.endswith(os_sep):
+                raise BadConfiguration(f'Invalid destination path "{path}"')
+            if path in destinations:
+                raise BadConfiguration(f'Duplicate download recipe for "{path}"')
+            dl2 = {}
+            for k, v in dl.items():
+                if k == 'path':
+                    continue
+                if k not in known_keys_set:
+                    logging.warning('Ignoring unknown setting "%s" in download recipe for "%s"',
+                                    k, path)
+                elif not _check_key_type(k, v, known_keys):
+                    logging.warning('Ignoring setting "%s" in download recipe for "%s"'
+                                    ' (invalid type)', k, path)
+                else:
+                    dl2[k] = v
+            destinations[path] = dl2
+
+    return destinations
+
 # pylint: disable-next=invalid-name
 def getSourcePathLockFileName(path : str) -> str:
     """Return the name of the lockfile associated with a source path."""
diff --git a/config.yml b/config.yml
index a259628..fe991e2 100644
--- a/config.yml
+++ b/config.yml
@@ -231,6 +231,292 @@ downloads:
   - path: svk/SVK_STAMNAT.zip
     url: https://gis-services.metria.se/svkfeed/filer/SVK_STAMNAT.zip
 
+license-info:
+  # Map source paths to their metada (description, copyright, license
+  # information and link).
+  nvk/nvr/TILLTRADESFORBUD.zip:
+    description: "Skyddade områden: tillträdesförbud (föreskriftsområden)"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/F2554ED6-3A9B-4955-B4AC-D61B35026C88
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/NP.zip:
+    description: "Skyddade områden: nationalparker"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/bfc33845-ffb9-4835-8355-76af3773d4e0
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/NR.zip:
+    description: "Skyddade områden: naturreservat"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/2921b01a-0baf-4702-a89f-9c5626c97844
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/NVO.zip:
+    description: "Skyddade områden: naturvårdsområden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/dd8371a0-f692-44e3-bd0b-25de8dee8906
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/DVO.zip:
+    description: "Skyddade områden: djur- och växtskyddsområden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/b4bb8837-8980-4093-be7e-c09f650df996
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/KR.zip:
+    description: "Skyddade områden: kulturreservat"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/55d17118-f977-46c9-8691-20baf657796e
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/VSO.zip:
+    description: "Skyddade områden: vattenskyddsområden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/ae8d79d2-a799-4e1b-b500-05747a428816
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/LBSO.zip:
+    description: "Landskapsbildsskyddsområde"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/bf435698-15a4-4b0b-85ec-727605a0a6ba
+    license:
+      name: Inga begränsningar
+      url: https://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/noLimitations
+  sks/sksBiotopskydd_gpkg.zip:
+    description: "Biotopskydd beslutade av Skogsstyrelsen"
+    copyright: © Skogsstyrelsen
+    product_url: https://www.geodata.se/geodataportalen/GetMetaDataById?ID=772d46b8-25a2-42f7-b3da-4b17f610bc53
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/OBO.zip:
+    description: "Skyddade områden: biotopskyddsområden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/c3dd73b1-1c82-4db5-aac3-c8c6f240fa25
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/NM.zip:
+    description: "Skyddade områden: naturminnen"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/c6b02e88-8084-4b3f-8a7d-33e5d45349c4
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/IF.zip:
+    description: "Skyddade områden: interimistiska förbud"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/03e6e0d2-9ff8-4234-8dba-1a1ef88cb1ad
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/SPA_Rikstackande.zip:
+    description: "Skyddade områden: fågeldirektivet (Natura 2000, SPA)"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/a80bf3d7-e70c-42d1-9b8d-8148e53e011d
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/SCI_Rikstackande.zip:
+    description: "Skyddade områden: Art- och habitatdirektivet (Natura2000, SCI, SAC)"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/945e918f-8426-4155-8fd6-3f780a85dd8f
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/HELCOM.zip:
+    description: "Skyddade områden: marina områden i Sverige enligt Helcom (MPA)"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/834a442f-310f-4d2d-bd12-d8978d9683c5
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/Ramsar_2018.zip:
+    description: "Skyddade områden: Ramsarområden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/f2d8691f-8b75-4a62-8d94-7cb1982cceea
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/OSPAR.zip:
+    description: "Skyddade områden: marina områden i Sverige enligt Ospar"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/39948786-a278-4cdb-8b95-2ce99f941f65
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/Varldsarv.zip:
+    description: "Skyddade områden: världsarv med höga naturvärden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/f57de73f-0ce0-4be0-a638-5778bec38cde
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/biosfarsomraden.zip:
+    description: "Skyddade områden: biosfärsområden"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/bc2ce857-fa87-42f6-8870-fbdc3a9b113e
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/nvr/NVA.zip:
+    description: "Områden som omfattas av naturvårdsavtal (Naturvårdsverket, Länsstyrelsen)"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/3a5790ff-8cd3-45ea-bbee-28cf2c1b6b06
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  sks/sksNaturvardsavtal_gpkg.zip:
+    description: "Naturvårdsavtal upprättade av Skogsstyrelsen"
+    copyright: © Skogsstyrelsen
+    product_url: https://www.geodata.se/geodataportalen/GetMetaDataById?ID=f56d281c-8246-40aa-83cd-9db0d4389d5a
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  sks/sksAvverkAnm_gpkg.zip:
+    description: "Avverkningsanmälningar"
+    copyright: © Skogsstyrelsen
+    product_url: https://www.skogsstyrelsen.se/e-tjanster-och-kartor/karttjanster/skogsstyrelsens-geodata/
+    license:
+      # https://www.skogsstyrelsen.se/e-tjanster-och-kartor/karttjanster/geodatatjanster/villkor/
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  sks/sksUtfordAvverk_gpkg.zip:
+    description: "Utförda avverkningar"
+    copyright: © Skogsstyrelsen
+    product_url: https://www.skogsstyrelsen.se/e-tjanster-och-kartor/karttjanster/skogsstyrelsens-geodata/
+    license:
+      # https://www.skogsstyrelsen.se/e-tjanster-och-kartor/karttjanster/geodatatjanster/villkor/
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  mrr/mineralrattigheter.zip:
+    description: "Mineralrättigheter och prospektering"
+    copyright: © Sveriges geologiska undersökning (utdrag ur Bergsstatens mineralrättsregister)
+    product_url: https://www.sgu.se/produkter-och-tjanster/geologiska-data/malmer-och-mineral--geologiska-data/mineralrattigheter-och-prospektering/
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  ren/ren.riks_ren.zip:
+    description: "Riksintresse Rennäringen"
+    copyright: © Sametinget
+    product_url: https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=103cf137-9d56-452b-97d6-9b12cba6c864_C
+    license:
+      name: CC BY 4.0
+      url: https://creativecommons.org/licenses/by/4.0/deed.sv
+  ren/ren.omr_riks.zip:
+    description: "Riksintresse Rennäringen - Kärnområde"
+    copyright: © Sametinget
+    product_url: https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=b665a528-cd25-4612-8ab3-fa3e692b46c3_C
+    license:
+      name: CC BY 4.0
+      url: https://creativecommons.org/licenses/by/4.0/deed.sv
+  sametinget/Samebyarnas_markanvandningsredovisning.zip:
+    description: "Samebyarnas markanvändningsområden"
+    copyright: © Sametinget (Rennäringens markanvändningsdatabas IRENMARK)
+    product_url: https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=19b7addd-a790-4829-991f-f2266009e863_C
+    # Licens behövs, cf. 'Samebyarnas markanvändningsredovisning/avtal.pdf'
+    license: Se avtal.pdf i zip-filen
+  sametinget/Samebyarnas_betesomraden.zip:
+    description: "Samebyarnas betesområden"
+    copyright: © Sametinget (Rennäringens markanvändningsdatabas, IRENMARK)
+    product_url: https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=a216dea8-bfcb-4984-a18b-3a421cde2d57_C
+    # Licens behövs, cf. 'Samebyarnas_betesomraden/Samebyarnas betesområden/avtal.pdf'
+    license: Se avtal.pdf i zip-filen
+  nvk/RI_Naturvard.zip:
+    description: "Riksintresse naturvård"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/fb9ff32f-b6f8-4d8e-ac5c-20ebb0986908
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  nvk/RI_Friluftsliv.zip:
+    description: "Riksintresse friluftsliv"
+    copyright: © Naturvårdsverket
+    product_url: https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/22afb5cb-cdb0-4f3a-8b0f-a34344285864
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  lst/lst.LST_RI_Rorligt_friluftsliv_MB4kap2.zip:
+    description: "Riksintresse rörligt friluftsliv (MB 4 kap 1 och 2 §§)"
+    copyright: © Länsstyrelsen
+    product_url: https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=072b6b36-2cf6-4717-a616-bbf3fddea83d
+    license:
+      name: CC BY 4.0
+      url: https://creativecommons.org/licenses/by/4.0/deed.sv
+  lst/lst.LST_RI_Obruten_kust_MB4kap3.zip:
+    description: "Riksintresse obruten kust (MB 4 kap 3 §)"
+    copyright: © Länsstyrelsen — Förvaltningsobjekt Samhällsplanerin
+    product_url: https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=2b5b141f-a9a4-433a-8dc7-bf983acdb859
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  lst/lst.Lst_RI_Obrutet_fjall_MB4kap5.zip:
+    description: "Riksintresse obrutet fjäll (MB 4 kap 5 §)"
+    copyright: © Länsstyrelsen
+    product_url: https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=b1d59cb0-2e71-4c08-b99d-e4cc7507cb92
+    license: Inga begränsningar
+  lst/lst.LST_RI_Skyddade_vattendrag_MB4kap6.zip:
+    description: "Riksintresse skyddade vattendrag (MB 4 kap 6 §)"
+    copyright: © Länsstyrelsen
+    product_url: https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=61e21a50-4320-4db4-8e44-56252dab777e
+    license:
+      name: CC BY 4.0
+      url: https://creativecommons.org/licenses/by/4.0/deed.sv
+  vbk/lst.vbk_vindkraftverk.zip:
+    description: "Vindbrukskollen vindkraftverk"
+    copyright: © Länsstyrelsen
+    product_url: https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=ed5814b2-08bf-493a-a164-7819e1b590d6
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  vbk/lst.vbk_projekteringsomraden.zip:
+    description: "Vindbrukskollen projekteringsområden och vägar"
+    copyright: © Länsstyrelsen
+    product_url: https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=c816bd1e-bc6c-487f-a962-770f05f677b6_C
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  vbk/lst.vbk_havsbaserad_vindkraft.zip:
+    description: "LST Vindbrukskollen havsbaserad vindkraft"
+    copyright: © Länsstyrelsen
+    product_url: https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=c290bc31-1af8-497e-a9a5-87fcec55d0ce
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  svk/SVK_STAMNAT.zip:
+    description: "Transmissionsnät för el i Sverige"
+    copyright: © Svenska kraftnät
+    product_url: https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=08ec56a0-6b5c-4f83-b29e-375e6f1a34b9_C
+    license: Okänd
+  custom/svk/transmissionsnatsprojekt.geojson:
+    description: "Transmissionsnätsprojekt"
+    copyright: © Guilhem Moulin (egen ritning baserad på SvK:s tillståndsansökningar och handlingar)
+    product_url: https://www.svk.se/utveckling-av-kraftsystemet/transmissionsnatet/transmissionsnatsprojekt/
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  custom/gigafactories.geojson:
+    description: "Stora industrisatsningar"
+    copyright: © Guilhem Moulin
+    license:
+      name: CC0 1.0 Universiell
+      url: https://creativecommons.org/publicdomain/zero/1.0/deed.sv
+  custom/HY_PhysicalWaters_ManMadeObject.zip:
+    description: "Dammregistret"
+    copyright: © Sveriges meteorologiska och hydrologiska institut (SMHI)
+    product_url: https://www.smhi.se/data/sok-oppna-data-i-utforskaren/se-hy-dammregistret
+    license:
+      name: CC BY 4.0
+      url: https://creativecommons.org/licenses/by/4.0/deed.sv
+
 
 layers:
 #  # Dictionary of layer names and source recipes in the output dataset.  If a layer
@@ -1210,7 +1496,6 @@ layers:
     publish: landskapsbildsskyddsomrade
 
   'nvr:Biotopskydd':
-    # https://www.geodata.se/geodataportalen/GetMetaDataById?ID=772d46b8-25a2-42f7-b3da-4b17f610bc53
     # https://www.skogsstyrelsen.se/globalassets/sjalvservice/karttjanster/geodatatjanster/produktbeskrivningar/biotopskydd---produktbeskrivning.pdf
     description: Biotopskydd i skogsmark (beslutade av Skogsstyrelsen)
     create:
@@ -1992,7 +2277,6 @@ layers:
     publish: biosfarsomraden
 
   'nva:Naturvardsverket_Lansstyrelse':
-    # https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/3a5790ff-8cd3-45ea-bbee-28cf2c1b6b06
     description: Naturvårdsavtal (Naturvårdsverket, Länsstyrelse)
     create:
       geometry-type: MULTIPOLYGON
@@ -2037,7 +2321,6 @@ layers:
     publish: naturvardsavtal
 
   'nva:Skogsstyrelsen':
-    # https://www.geodata.se/geodataportalen/GetMetaDataById?ID=f56d281c-8246-40aa-83cd-9db0d4389d5a
     description: Naturvårdsavtal (Skogsstyrelsen)
     create:
       geometry-type: MULTIPOLYGON
@@ -2275,8 +2558,6 @@ layers:
     publish: clearcut_comp
 
   'sametinget:betesomraden':
-    # https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=a216dea8-bfcb-4984-a18b-3a421cde2d57_C
-    # Licens behövs, cf. 'Samebyarnas_betesomraden/Samebyarnas betesområden/avtal.pdf'
     description: 'Samebyarnas betesområden: Renbetesområden'
     create:
       # https://ext-dokument.lansstyrelsen.se/Gemensamt/Geodata/Datadistribution/Information,%20Skiktf%C3%B6rteckning%20och%20f%C3%B6rklaringar.pdf
@@ -2328,8 +2609,6 @@ layers:
     publish: betesomraden
 
   'sametinget:flyttled':
-    # https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=19b7addd-a790-4829-991f-f2266009e863_C
-    # Licens behövs, cf. 'Samebyarnas_betesomraden/Samebyarnas betesområden/avtal.pdf'
     description: 'Samebyarnas markanvändningsredovisning: Flyttled'
     create:
       # https://ext-dokument.lansstyrelsen.se/Gemensamt/Geodata/Datadistribution/Information,%20Skiktf%C3%B6rteckning%20och%20f%C3%B6rklaringar.pdf
@@ -2408,7 +2687,6 @@ layers:
     publish: flyttled
 
   'ren:riks_ren':
-    # https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=103cf137-9d56-452b-97d6-9b12cba6c864_C
     description: 'Riksintresse Rennäringen'
     create:
       geometry-type: MULTIPOLYGON
@@ -2451,7 +2729,6 @@ layers:
     publish: riks_ren
 
   'ren:omr_riks':
-    # https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=b665a528-cd25-4612-8ab3-fa3e692b46c3_C
     description: 'Riksintresse Rennäringen — Kärnområde'
     create:
       geometry-type: MULTIPOLYGON
@@ -3857,7 +4134,6 @@ layers:
             with: null
 
   'ri:naturvard':
-    # https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/fb9ff32f-b6f8-4d8e-ac5c-20ebb0986908
     description: Riksintresse naturvård
     create:
       geometry-type: MULTIPOLYGON
@@ -3909,7 +4185,6 @@ layers:
     publish: naturvard
 
   'ri:friluftsliv':
-    # https://geodatakatalogen.naturvardsverket.se/geonetwork/srv/swe/catalog.search#/metadata/22afb5cb-cdb0-4f3a-8b0f-a34344285864
     description: Riksintresse friluftsliv
     create:
       geometry-type: MULTIPOLYGON
@@ -3976,8 +4251,7 @@ layers:
     publish: friluftsliv
 
   'ri:rorligt_friluftsliv':
-    # https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=22afb5cb-cdb0-4f3a-8b0f-a34344285864_C
-    description: Rörligt friluftsliv (MB 4 kap 1§ och 2§)
+    description: Rörligt friluftsliv (MB 4 kap 1 och 2 §§)
     create:
       geometry-type: MULTIPOLYGON
       fields:
@@ -4020,8 +4294,7 @@ layers:
     publish: rorligt_friluftsliv
 
   'ri:obruten_kust':
-    # https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=2b5b141f-a9a4-433a-8dc7-bf983acdb859
-    description: Obruten kust (MB 4 kap 3§)
+    description: Obruten kust (MB 4 kap 3 §)
     create:
       geometry-type: MULTIPOLYGON
       fields:
@@ -4067,8 +4340,7 @@ layers:
     publish: obruten_kust
 
   'ri:obrutet_fjall':
-    # https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=b1d59cb0-2e71-4c08-b99d-e4cc7507cb92
-    description: Obrutet fjäll (MB 4 kap 5§)
+    description: Obrutet fjäll (MB 4 kap 5 §)
     create:
       geometry-type: MULTIPOLYGON
       fields:
@@ -4109,8 +4381,7 @@ layers:
     publish: obrutet_fjall
 
   'ri:skyddade_vattendrag':
-    # https://ext-geodatakatalog.lansstyrelsen.se/GeodataKatalogen/srv/api/records/GetMetaDataById?id=61e21a50-4320-4db4-8e44-56252dab777e
-    description: Skyddade vattendrag (MB 4 kap 6§)
+    description: Skyddade vattendrag (MB 4 kap 6 §)
     create:
       geometry-type: MULTIPOLYGON
       fields:
@@ -4161,7 +4432,6 @@ layers:
     publish: skyddade_vattendrag
 
   'svk:ledningar':
-    # https://ext-geodatakatalog-forv.lansstyrelsen.se/PlaneringsKatalogen/GetMetaDataById?id=08ec56a0-6b5c-4f83-b29e-375e6f1a34b9_C
     description: Kraftledningar (befintliga)
     create:
       geometry-type: MULTILINESTRING
@@ -4234,7 +4504,6 @@ layers:
         minzoom: 7
 
   'svk:transmissionsnatsprojekt':
-    # https://www.svk.se/utveckling-av-kraftsystemet/transmissionsnatet/transmissionsnatsprojekt/
     description: Transmissionsnätsprojekt
     create:
       geometry-type: MULTILINESTRING
@@ -4283,7 +4552,6 @@ layers:
         minzoom: 6
 
   'dammar':
-    # https://www.smhi.se/data/utforskaren-oppna-data/se-hy-dammregistret
     description: Dammar
     create:
       # https://www.smhi.se/polopoly_fs/1.34541!/dammprod%202013_3%2C%20beskrivning%2C%20SVAR2012_2.pdf
diff --git a/export_mvt.py b/export_mvt.py
index a929b78..d19909c 100644
--- a/export_mvt.py
+++ b/export_mvt.py
@@ -20,7 +20,7 @@
 
 # pylint: disable=invalid-name, missing-module-docstring, fixme
 
-from os import O_RDONLY, O_WRONLY, O_CREAT, O_EXCL, O_CLOEXEC, O_DIRECTORY, F_OK
+from os import O_RDONLY, O_WRONLY, O_CREAT, O_EXCL, O_TRUNC, O_CLOEXEC, O_DIRECTORY, F_OK
 import os
 from errno import EAGAIN
 import json
@@ -29,7 +29,7 @@ from pathlib import Path
 import shutil
 import tempfile
 from typing import Any, Iterator, Optional
-from time import monotonic as time_monotonic
+from time import monotonic as time_monotonic, time_ns
 
 import brotli
 from osgeo import gdal, ogr, osr
@@ -274,9 +274,89 @@ def compress_brotli(path : str,
         os.close(fd_in)
     return size_in, size_out
 
+def getLayerMetadata(layers : dict[str,Any],
+                     sources : dict[str,Any],
+                     license_info: dict[str,str|dict[str,str]],
+                     last_modified : dict[str,int],
+                     last_updated : int) -> dict[str,int|dict[int|str|dict[str,str]]]:
+    """Return a dictionary suitable for metadata.json"""
+    layers2 = {}
+    for k, v in layers.items():
+        layers2[k] = x = {}
+        if 'description' in v:
+            x['description'] = v['description']
+        source_paths = []
+        for src in v.get('sources', []):
+            if 'source' not in src or src['source'] is None:
+                continue
+            if 'path' not in src['source']:
+                continue
+            source_path = src['source']['path']
+            if source_path is not None:
+                source_paths.append(source_path)
+        if len(source_paths) > 0:
+            # remove duplicates but preserve order
+            x['source_files'] = list(dict.fromkeys(source_paths))
+
+    source_files = {}
+    for source_path in { p for v in layers2.values() for p in v.get('source_files', []) }:
+        source_files[source_path] = x = {}
+        if source_path in sources and 'url' in sources[source_path]:
+            x['url'] = sources[source_path]['url']
+        if source_path not in license_info:
+            logging.warning('Source path %s lacks license information', source_path)
+        else:
+            license_info0 = license_info[source_path]
+            for k in ('description', 'copyright', 'product_url'):
+                if k in license_info0:
+                    x[k] = license_info0[k]
+            if 'license' in license_info0:
+                if isinstance(license_info0['license'], str):
+                    x['license'] = { 'name': license_info0['license'] }
+                elif isinstance(license_info0['license'], dict):
+                    x['license'] = license_info0['license'].copy()
+        if source_path not in last_modified:
+            logging.warning('Source path %s lack last_modified value', source_path)
+        else:
+            x['last_modified'] = last_modified[source_path]
+
+    return {
+        'layers': layers2,
+        'source_files': source_files,
+        'last_updated': last_updated
+    }
+
+def exportMetadata(basedir : Path, data : dict[str,Any],
+                   dir_fd : Optional[int] = None,
+                   compress : bool = False) -> None:
+    """Generate metadata.json"""
+    data = json.dumps(data, ensure_ascii=False, separators=(',',':')).encode('utf-8')
+    path = basedir.joinpath('metadata.json')
+    flags = O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC
+
+    fd = os.open(str(path), flags, mode=0o644, dir_fd=dir_fd)
+    try:
+        write_all(fd, data)
+    finally:
+        os.close(fd)
+
+    if not compress:
+        return
+
+    compressor = brotli.Compressor(mode=brotli.MODE_GENERIC, quality=11)
+    fd = os.open(str(path.with_suffix('.json.br')), flags, mode=0o644, dir_fd=dir_fd)
+    try:
+        write_all(fd, compressor.process(data))
+        write_all(fd, compressor.finish())
+    finally:
+        os.close(fd)
+
 # pylint: disable-next=too-many-branches, too-many-statements
 def exportMVT(ds : gdal.Dataset,
               layers : dict[str,dict[str,Any]],
+              sources : dict[str,Any],
+              license_info: dict[str,str|dict[str,str]],
+              last_modified : dict[str,int],
               dst : Path,
               drvname : str = 'MVT',
               default_options : dict[str,Any]|None = None,
@@ -321,6 +401,7 @@ def exportMVT(ds : gdal.Dataset,
         start = time_monotonic()
         os.mkdir(dbname, mode=0o700, dir_fd=dir_fd)
         basedir = Path(f'/proc/self/fd/{dir_fd}')
+        creation_time = time_ns()
         dso = createMVT(drv, path=str(basedir.joinpath(mvtname)),
                         default_options=default_options,
                         options = {
@@ -406,11 +487,14 @@ def exportMVT(ds : gdal.Dataset,
                     format_bytes(size_min_z), format_bytes(size_max_z),
                     format_bytes(size_tot_z), format_bytes(round(size_tot_z/tile_count)))
 
-        try:
-            # OpenLayers doesn't make use of that file so delete it
-            os.unlink(str(Path(mvtname).joinpath('metadata.json')), dir_fd=dir_fd)
-        except FileNotFoundError:
-            pass
+        exportMetadata(basedir=Path(mvtname),
+                       data=getLayerMetadata({k:layers[v] for k,(v,_) in export_layers.items()},
+                                             sources=sources,
+                                             license_info=license_info,
+                                             last_modified=last_modified,
+                                             last_updated=creation_time // 1000000),
+                       dir_fd=dir_fd,
+                       compress=compress)
 
         try:
             # atomically exchange paths
diff --git a/webmap-download b/webmap-download
index 2c475fe..5e191ad 100755
--- a/webmap-download
+++ b/webmap-download
@@ -32,8 +32,6 @@ from os import (
     O_TMPFILE,
     path as os_path,
     curdir as os_curdir,
-    pardir as os_pardir,
-    sep as os_sep
 )
 import os
 import sys
@@ -48,7 +46,7 @@ from typing import Optional, NoReturn, Never
 import requests
 
 import common
-from common import BadConfiguration, getSourcePathLockFileName
+from common import parse_config_dl, getSourcePathLockFileName
 
 def download_trystream(url : str, **kwargs) -> requests.Response:
     """GET a url, trying a number of times. Return immediately after the
@@ -167,64 +165,6 @@ def download(dest : str,
                  common.format_time(elapsed),
                  common.format_bytes(int(size/elapsed)))
 
-def _check_key_type(k : str, v : str, known_keys : list[type, tuple[set[str]]]) -> bool:
-    for t, ks in known_keys:
-        if k in ks and isinstance(v, t):
-            return True
-    return False
-
-def parse_config_dl(downloads) -> dict[str, dict[str, str|int]]:
-    """Parse and validate the "downloads" section from the configuration dictionary"""
-
-    if not isinstance(downloads, list):
-        raise BadConfiguration(f'Invalid download recipe: {downloads}')
-
-    known_keys = [
-        (str, {'path', 'url'}),
-        (int, {'max-age', 'max-size'})
-    ]
-
-    destinations = {}
-    known_keys_set = {k for _,ks in known_keys for k in ks}
-    for dl in downloads:
-        if 'url' in dl:
-            dls = [dl]
-        elif 'basedir' in dl and 'baseurl' in dl and 'files' in dl and 'path' not in dl:
-            dls = []
-            for filename in dl['files']:
-                dl2 = {
-                    'path' : os_path.join(dl['basedir'], filename),
-                    'url' : dl['baseurl'] + filename
-                }
-                for k, v in dl.items():
-                    if k not in ('basedir', 'baseurl', 'files'):
-                        dl2[k] = v
-                dls.append(dl2)
-        else:
-            raise BadConfiguration(f'Invalid download recipe: {dl}')
-
-        for dl in dls:
-            path = dl.get('path', None)
-            if path is None or path in ('', os_curdir, os_pardir) or path.endswith(os_sep):
-                raise BadConfiguration(f'Invalid destination path "{path}"')
-            if path in destinations:
-                raise BadConfiguration(f'Duplicate download recipe for "{path}"')
-            dl2 = {}
-            for k, v in dl.items():
-                if k == 'path':
-                    continue
-                if k not in known_keys_set:
-                    logging.warning('Ignoring unknown setting "%s" in download recipe for "%s"',
-                                    k, path)
-                elif not _check_key_type(k, v, known_keys):
-                    logging.warning('Ignoring setting "%s" in download recipe for "%s"'
-                                    ' (invalid type)', k, path)
-                else:
-                    dl2[k] = v
-            destinations[path] = dl2
-
-    return destinations
-
 # pylint: disable-next=missing-function-docstring
 def main() -> NoReturn:
     common.init_logger(app=os_path.basename(__file__), level=logging.INFO)
diff --git a/webmap-import b/webmap-import
index c86e7a2..e5a1426 100755
--- a/webmap-import
+++ b/webmap-import
@@ -47,6 +47,7 @@ from osgeo import gdalconst
 import common
 from common import (
     BadConfiguration,
+    parse_config_dl,
     escape_identifier,
     escape_literal_str,
     getSourcePathLockFileName
@@ -524,6 +525,26 @@ def areSourceFilesNewer(layername : str,
                          source_path, dt.astimezone().isoformat(timespec='seconds'))
     return ret
 
+def getLastMTimes(layerdefs : dict[str,Any], basedir : Optional[Path] = None) -> dict[str,int]:
+    """Return a directing mapping source paths to their last modification time
+    (as a timestamp in milliseconds)."""
+    ret = {}
+    for layerdef in layerdefs:
+        for source in layerdef['sources']:
+            source_path = source['source']['path']
+            if source_path in ret:
+                continue
+            path = source_path if basedir is None else str(basedir.joinpath(source_path))
+            try:
+                st = os.stat(path)
+                if not S_ISREG(st.st_mode):
+                    raise FileNotFoundError
+                ret[source_path] = st.st_mtime_ns // 1000000
+            except (OSError, ValueError):
+                #logging.warning('Could not stat(%s)', path)
+                pass
+    return ret
+
 def lockSourcePaths(layerdefs : dict[str,Any], lockdir: str) -> dict[str,int]:
     """Place shared locks on each source path and return their respective file
     descriptors.  We could do that one layerdef at a time (one output layer at a
@@ -703,6 +724,9 @@ def main() -> NoReturn:
         elapsed = time_monotonic() - start
         logging.info('Processed %d destination layers in %s', n, common.format_time(elapsed))
 
+        # get mtimes before releasing the source locks
+        last_modified = getLastMTimes(layerdefs=layers.values(), basedir=args.cachedir)
+
         if sourcePathLocks is not None:
             releaseSourcePathLocks(sourcePathLocks)
 
@@ -716,7 +740,11 @@ def main() -> NoReturn:
             logging.info('Skipping MVT export for group %s (no changes)',
                          ', '.join(args.groupname) if args.groupname is not None else '*')
         else:
-            exportMVT(dso, layers=export_layers,
+            exportMVT(dso,
+                      layers=export_layers,
+                      sources=parse_config_dl(config.get('downloads', [])),
+                      license_info=config.get('license-info', {}),
+                      last_modified=last_modified,
                       dst=args.mvtdir,
                       default_options=config.get('vector-tiles', None),
                       compress=args.mvt_compress)