diff --git a/docs/national-dem-dsm/README.md b/docs/national-dem-dsm/README.md index b2dcd312..9b40902e 100644 --- a/docs/national-dem-dsm/README.md +++ b/docs/national-dem-dsm/README.md @@ -1,33 +1,26 @@ -# Other countries DEM/DSM publication +# Other Countries DEM/DSM Publication -Before making recommendations on how to standardise New Zealand's DEM/DSM data LINZ took a brief look at other jurisdictions and how they standardised their DEM and DSM +Before making recommendations on how to standardise New Zealand's DEM/DSM data, LINZ took a brief look at other jurisdictions and how they standardised their DEMs and/or DSMs. The key areas to look at were - -- compression - What lossless compression was most common +- compression - what lossless compression was most common - size - width and height of image - file size - how big each tile is -- storage type (Tiff/COG/other) +- storage type (TIFF/COG/other) -| Country | Name | Dimensions | File SIze | Type | Compression | DataType | Nodata | CRS | PixelIsPoint | Comments | +| Country | Name | Dimensions (px) | File SIze | Type | Compression | DataType | Nodata | CRS | PixelIsPoint | Comments | | :---------- | :----------------------------------------------------------------------------------------------------------- | :---------------------: | --------- | ------------- | ---------------- | -------- | ------- | ---------- | ------------ | -------- | -| New Zealand | [National Elevation 1m DEM](https://data.linz.govt.nz/group/national-elevation/data/) | 480x720 px | 1.4MB | GeoTiff | LZW | Float32 | -9999 | EPSG:2193 | Area/Point | | -| Switzerland | [swissSURFACE3D Raster (50cm)](https://www.swisstopo.admin.ch/en/geodata/height/surface3d-raster.html) | 2,000x2,000 px | 16MB | GeoTiff (COG) | LZW | Float32 | -9999 | EPSG:2056 | Area | | -| USA - USGS | [National Map 3DEP](http://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/) | 10,012x10,012 px | 280MB | GeoTiff (COG) | LZW (predictor3) | Float32 | -999999 | EPSG:26910 | Area | | -| USA - NOAA | [NOAA Digital Coast LiDAR](https://coast.noaa.gov/dataviewer/#/lidar/search/) | 8,463x6,475 px | 189NB | GeoTiff | LZW | Float32 | -999999 | EPSG:2229 | | In Feet | -| Australia | [Victoria 50cm DEM](https://elevation.fsdf.org.au/) | 10,000x10,000
Varies | 4MB | GeoTiff (COG) | LZW | Float32 | -9999 | EPSG:7855 | | | -| Finland | [2M DEM](https://asiointi.maanmittauslaitos.fi/karttapaikka/tilausvahvistus) | 3,000x3,000 px | 20MB | GeoTiff | LZW | Float32 | -9999 | EPSG:3067 | | | -| Canada | [HRDEM - CanElevation Series](https://open.canada.ca/data/en/dataset/957782bf-847c-4644-a757-e383c0057995) | 10,000x10,000 | | GeoTiff | LZW | Float32 | -32767 | EPSG:2958 | | | -| Norway | [Norway DTM1](https://hoydedata.no/LaserInnsyn2/) | 15,010x15,010 | | GeoTiff | LZW | | | | | | +| New Zealand | [National Elevation 1m DEM](https://data.linz.govt.nz/group/national-elevation/data/) | 480x720 | 1.4MB | GeoTIFF | LZW | Float32 | -9999 | EPSG:2193 | Area/Point | | +| Switzerland | [swissSURFACE3D Raster (50cm)](https://www.swisstopo.admin.ch/en/geodata/height/surface3d-raster.html) | 2,000x2,000 | 16MB | GeoTIFF (COG) | LZW | Float32 | -9999 | EPSG:2056 | Area | | +| USA - USGS | [National Map 3DEP](http://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/) | 10,012x10,012 | 280MB | GeoTIFF (COG) | LZW (predictor3) | Float32 | -999999 | EPSG:26910 | Area | | +| USA - NOAA | [NOAA Digital Coast LiDAR](https://coast.noaa.gov/dataviewer/#/lidar/search/) | 8,463x6,475 | 189NB | GeoTIFF | LZW | Float32 | -999999 | EPSG:2229 | | In Feet | +| Australia | [Victoria 50cm DEM](https://elevation.fsdf.org.au/) | 10,000x10,000
Varies | 4MB | GeoTIFF (COG) | LZW | Float32 | -9999 | EPSG:7855 | | | +| Finland | [2M DEM](https://asiointi.maanmittauslaitos.fi/karttapaikka/tilausvahvistus) | 3,000x3,000 | 20MB | GeoTIFF | LZW | Float32 | -9999 | EPSG:3067 | | | +| Canada | [HRDEM - CanElevation Series](https://open.canada.ca/data/en/dataset/957782bf-847c-4644-a757-e383c0057995) | 10,000x10,000 | | GeoTIFF | LZW | Float32 | -32767 | EPSG:2958 | | | +| Norway | [Norway DTM1](https://hoydedata.no/LaserInnsyn2/) | 15,010x15,010 | | GeoTIFF | LZW | | | | | | | France | [RGE ALTI 1m](https://geoservices.ign.fr/rgealti) | 1,000x1,000 | | Ascii Grid | | | | | | | -| Netherlands | [Actueel Hoogtebestand Nederland AHN3](https://app.pdok.nl/rws/ahn3/download-page/) | 10,000x12,500 | | GeoTiff | RAW (Zipped) | | 3.4e+38 | EPSG:28992 | | | -| Scotland | [LiDAR for Scotland DTM](https://remotesensingdata.gov.scot/data#/list) | 10,000x6,000 | 132MB | GeoTiff | LZW | | -9999 | EPSG:27700 | Area | | +| Netherlands | [Actueel Hoogtebestand Nederland AHN3](https://app.pdok.nl/rws/ahn3/download-page/) | 10,000x12,500 | | GeoTIFF | RAW (Zipped) | | 3.4e+38 | EPSG:28992 | | | +| Scotland | [LiDAR for Scotland DTM](https://remotesensingdata.gov.scot/data#/list) | 10,000x6,000 | 132MB | GeoTIFF | LZW | | -9999 | EPSG:27700 | Area | | | | | | | | | | | | | | -​Elvis - Elevation and Depth - Foundation Spatial Data - -https://asiointi.maanmittauslaitos.fi/karttapaikka/tilausvahvistus - -File Tested - -Scotland - NN70_1M_DSM_PHASE1.tif +This table was recorded in May 2023 and may now be out-of-date.