current DEM workflow tips - source files

Started by amandas, July 09, 2020, 07:54:14 am

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amandas

Hi!

I am doing a quick R&D on geospatial data workflow inside Terragen and would welcome some tips/links to resources on what is the fastest way to acquire data. I have skimmed several tutorials on that for TGN, played with GIS websites, etc... I am a total newbie in that area, so sorry if my questions will seem naive. My questions are these:

1. MULTIPLE DEMS (selected region)
a) What is the most fuss-free approach to getting multiple seamless DEMs inside TGN (seamless.usgs.gov is unavailable).
b) I have played with https://viewer.nationalmap.gov. I can download chosen heightfield data "products" for the rectangle I select. What about color data matching those heightfields? (same cropping of files)?
c) I have seen Global Mapper used for certain operations, like pulling data or mapping conversions. The best free alternative seems to be QGIS. Or am I wrong here?

2. FULL EARTH COVERAGE
a) should I pull Earth imagery from NASA or is there a better resource?
b) what is the most detailed resource for this task (free) ?

Thank you in advance!
Artist / Developer
open for freelance / full project cycle
http://arturmandas.com


amandas

Artist / Developer
open for freelance / full project cycle
http://arturmandas.com


WAS

Quote from: D.A. Bentley on July 10, 2020, 02:20:55 pmTerrain Party:
http://terrain.party/

Various USGS Sources:
https://earthexplorer.usgs.gov/
https://www.usgs.gov/core-science-systems/ngp/tnm-delivery/
https://glovis.usgs.gov/
https://viewer.nationalmap.gov/basic/
https://viewer.nationalmap.gov/advanced-viewer/

NOAA:
https://noaa.maps.arcgis.com/home/webmap/viewer.html
https://www.ngdc.noaa.gov/mgg/bathymetry/relief.html
https://maps.ngdc.noaa.gov/viewers/bathymetry/
https://www.ngdc.noaa.gov/mgg/coastal/coastal.html
https://www.ngdc.noaa.gov/ngdcinfo/onlineaccess.html
https://www.ngdc.noaa.gov/mgg/coastal/crm.html
https://maps.ngdc.noaa.gov/viewers/grid-extract/index.html

WebGIS:
http://www.webgis.com/index.html

Land Info New Zealand:
https://www.linz.govt.nz/data/linz-data/elevation-data
https://www.linz.govt.nz/land/maps/linz-topographic-maps/map-chooser?xPos=11791&yPos=9489&scale=2&extent=0-BJ34


SRTM Data:
http://srtm.csi.cgiar.org/


ALOS Global Digital Surface Model "ALOS World 3D - 30m (AW3D30)"
https://www.eorc.jaxa.jp/ALOS/en/aw3d30/index.htm


Misc:
https://github.com/openterrain/openterrain/wiki/Terrain-Data
http://www.shadedrelief.com/
http://www.shadedrelief.com/maps-and-data.html

Space Data:
https://astrogeology.usgs.gov/search/results?q=DEM+Data

terrain.party has really low res terrains imo, but regardless, offer a extremely straight forward process to concept stuff. The elevation data in WA doesn't seem to strip trees either, so in logging areas, creating terraced grounds that don't exist. Lol

amandas

Artist / Developer
open for freelance / full project cycle
http://arturmandas.com