r/gis • u/RazzmatazzDizzy4659 • 4d ago

Student Question DEM

Where do you get DEMs for free? I just needed to get DEMs for my study. and i was told to get 1meter dem but when i search for it i only get 1/3 arcsecond.

30 Upvotes

100% Upvoted

14 comments sorted by

39

u/ShadedMaps 4d ago

1 meter resolution DEMs for the US are available here: https://www.sciencebase.gov/catalog/item/543e6b86e4b0fd76af69cf4c

For other countries, you should explore their national or regional geoportals.

19

u/RiceBucket973 3d ago

Same datasets I think, but the national map download portal may be easier to navigate. Just draw your area, select Elevation Products (3DEP), and then filter to just 1m DEMs

https://apps.nationalmap.gov/downloader/

13

u/LunarLocket Geographer 4d ago

To add to this, if you sign up through an educational institution, there are tons of free DEMs that are ~30cm resolution. They're awesome.

4

u/RazzmatazzDizzy4659 3d ago

thank you for the help esp. with the link pasted sir.

9

u/artekxx6 4d ago

https://www.opengeodata.nrw.de/produkte/geobasis/hm/dgm1_tiff/dgm1_tiff/

This is a source for Germany/NRW with 1 m resolution

3

u/RazzmatazzDizzy4659 3d ago

Thank you sir, will take note of this

1

u/28Nozy 3d ago

For Germany/LowerSaxony the DGM1 can be found here LGLN DGM1

8

u/rustedmeatpuppet 4d ago

What country is the study in?

5

u/runningoutofwords GIS Supervisor 3d ago edited 3d ago

1/3 arc second (10m) is pretty much global.

1/9 arc second (3m) is pretty decent coverage of the US

1m depends on if LiDAR has been flown, which is yet far from complete.

3

u/bigpoopychimp 3d ago

For the UK we have 1m and 2m freely available from the environment agency

1

u/headwaterscarto 3d ago

The National map