lmi

# LMI (Landmælingar Íslands) — National Land Survey **Requires:** Tier 1 (maps) — WFS download is core, rendering via kortagerð needs `uv sync --group maps`. Vector geodata for Iceland mapping via GeoServer WFS. Pre-cached layers in `data/geodata/` for fast map generation. ## API **Base URL:** `https://gis.lmi.is/geoserver/{workspace}/wfs` No authentication required. WFS 2.0.0 protocol. Supports GeoJSON, GML, KML, Shapefile, GeoPackage output. ### Workspaces | Workspace | Description | Scale | |-----------|-------------|-------| | `ERM` | EuroRegionalMap — core topographic vectors | 1:250,000 | | `EBM` | EuroBoundaryMap — administrative boundaries | 1:100,000 | | `ni` | Náttúrufræðistofnun — geology, nature, vegetation | 1:600,000 | | `LMI_vektor` | Misc — municipalities, volcanic hazards, contours | varies | | `LHG` | Landhelgisgæslan — maritime zones, depth contours | varies | ### WFS Request Pattern ``` https://gis.lmi.is/geoserver/{workspace}/wfs?service=WFS&version=2.0.0&request=GetFeature&typeName={layer}&outputFormat=application/json&srsName=EPSG:4326 ``` ### Example ```bash curl "https://gis.lmi.is/geoserver/ERM/wfs?service=WFS&version=2.0.0&request=GetFeature&typeName=ERM:Landmask&outputFormat=application/json&srsName=EPSG:4326" > Landmask.geojson ``` ## Pre-Cached Core Layers Downloaded via `uv run python scripts/lmi.py download` into `data/geodata/`: | Layer | Features | Size | Use | |-------|----------|------|-----| | `ERM:Landmask` | 104 | 1.0 MB | Iceland land polygon (base fill) | | `ERM:CoastalLine` | 123 | 1.0 MB | Coastline outline | | `EBM:AdministrativeUnit_level2` | 128 | 4.1 MB | Municipalities with names (`namn` field) | | `ERM:AdministrativeAreas` | 2,713 | 5.6 MB | Small admin zones (code-based, no names) | | `ERM:RoadLines` | 2,918 | 3.4 MB | Road network (classified by `rtt`) | | `ERM:WatercourseLine` | 28,536 | 27.2 MB | Rivers and streams | | `ERM:Lake_Reservoir` | 2,376 | 5.2 MB | Lakes and reservoirs | | `ERM:LandIceArea` | 188 | 0.8 MB | Glaciers (jöklar) | | `ERM:BuiltupAreaPoints` | 98 | 0.1 MB | Settlements with population (`ppl` field) | | `ERM:BuiltupArea` | 22 | 0.0 MB | Urban area polygons | | `ERM:NamedLocation_gnamel` | 616 | 0.3 MB | Place names | | `ERM:IslandArea` | 281 | 0.5 MB | Islands | | `ERM:Airport_Airfield_points` | 61 | 0.0 MB | Airports | | `ERM:Port` | 11 | 0.0 MB | Harbors | | `ERM:NatureParkArea` | 40 | 0.7 MB | National parks and reserves | **Total: ~50 MB cached** ## Key Field Schemas ### EBM Municipalities (`AdministrativeUnit_level2`) - `namn` — Municipality name (Icelandic, e.g., "Reykjavíkurborg") - `shn` — Code (e.g., "IS0000") - `desn` — Type (always "Sveitarfélag") ### ERM Roads (`RoadLines`) - `namn1` — Road name, `rtn` — Route number - `rtt` — Route type: 1-3 = major, 4-10 = secondary, >10 = minor - `rsu` — Surface type, `len` — Length in km ### ERM Settlements (`BuiltupAreaPoints`) - `namn1` — Settlement name, `ppl` — Population count - `use` — Classification (2=town, 3=village) ### ERM Named Locations (`NamedLocation_gnamel`) - `namn1` — Icelandic name, `nama1` — ASCII transliteration ## Extra Layers (Fetch on Demand) ```bash uv run python scripts/lmi.py fetch ERM:WetlandArea ``` Available extras: WetlandArea, VegetationArea, PowerTransmissionLine, SpringPoint, WaterfallLine, PhysiographyPoint, SeaArea, Building, FerryCrossing, and more. Run `uv run python scripts/lmi.py list` for the full catalog. ### Geology (ni namespace) - `ni:ni_j600v_berg_2_jardlog_2utg_fl` — Bedrock geology polygons (1:600k) - `ni:ni_j600v_berg_2_brotalina_1utg_li` — Fault lines - `ni:ni_j600v_berg_2_gosspr_1utg_li` — Eruptive fissures - `ni:ni_j600v_berg_2_gigar_1utg_p` — Volcanic craters ### Regions - `LMI_vektor:landshlutar` — Regions of Iceland (Landshlutar) ## Script Usage ```bash # List available layers and cache status uv run python scripts/lmi.py list # Download all core layers (~50 MB) uv run python scripts/lmi.py download # Fetch a specific extra layer uv run python scripts/lmi.py fetch ERM:WetlandArea # Generate interactive HTML map uv run python scripts/kortagerð.py html -o reports/iceland-map.html # Generate static PNG map uv run python scripts/kortagerð.py static -o reports/iceland-map.png # Zoomed map with municipality highlight uv run python scripts/kortagerð.py static --bounds capital --highlight "Reykjavíkurborg" -o reports/rvk.png ``` ## Coordinate Systems All cached files use **WGS84 (EPSG:4326)**. The native Icelandic CRS is **ISN93 (EPSG:3057)**. Reproject if needed for precise area/distance calculations. ## Caveats - ERM data is at 1:250,000 scale — good for country/region maps, not street-level detail - `AdministrativeAreas` (ERM, 2713 zones) has NO name field — use `AdministrativeUnit_level2` (EBM, 128 municipalities) for named boundaries - `NamedLocation` returns 0 features; use `NamedLocation_gnamel` instead - WatercourseLine is the largest layer (28k features, 27 MB) — may be slow to render in interactive maps - Icelandic characters (þ, ð, æ, ö) are preserved in GeoJSON; ensure UTF-8 encoding