<p>'Better' will depend on your planned usage - any global product will have limitations in terms of overall accuracy and precision, and both the Aster photogrammetric data and the widely used <a href="https://www2.jpl.nasa.gov/srtm/" rel="noreferrer">radar SRTM data</a> don't have data at the poles. The <a href="https://spacedata.copernicus.eu/web/cscda/dataset-details?articleId=394198" rel="noreferrer">Copernicus GLO-90 DEM</a> is an alternative. At full resolution these are large datasets, so you may want to seek out a reduced resolution dataset, e.g. the <a href="https://catalog.data.gov/dataset/srtm30-global-1-km-digital-elevation-model-dem-version-11-land-surface" rel="noreferrer">1km gridded NASA data</a>.</p>

CC BY-SA 4.0
2022-06-21T09:32:36.673Z
Hi thanks for your answer: Is there a Geotiff wich only have the data for the land and not from the oceans?
Weiss
CC BY-SA 4.0
2022-06-21T09:44:03.620Z
Not sure you will find that in a global model - so you might need to filter a global dataset by a land cover dataset that defines ocean
Andy M
CC BY-SA 4.0
2022-06-21T09:46:33.163Z
ok sounds complicaded! but thanks
Weiss
CC BY-SA 4.0
2022-06-21T10:38:47.283Z
Actually I think the 1km gridded NASA data is a land surface only dataset, so I guess fits your requirement
Andy M
CC BY-SA 4.0
2022-06-21T09:26:43.770Z
2022-06-21T09:26:43.770Z
Andy M
<p>I need elevation data with lat and long for a project worldwide. By intuition I would say that a GeoTiff would be suitable, e.g. the one from <a href="https://asterweb.jpl.nasa.gov/gdem.asp" rel="noreferrer">https://asterweb.jpl.nasa.gov/gdem.asp</a>.</p>
<p>Are there better ones, or does this one not contain any elevation data? Does anyone know where there are open source Geotiffs that are good? Or are there open source CSV files that contain the required information, or similar?</p>
<p>ps. I only need the surface data from the mainland, not from the oceans.</p>

<climate-models><mapping>
Geotiff for Elevation Data or NetCDF
Weiss
# Geotiff for Elevation Data or NetCDF

(Asked by: username_0 on 2022-06-21)

I need elevation data with lat and long for a project worldwide. By intuition I would say that a GeoTiff would be suitable, e.g. the one from <https://asterweb.jpl.nasa.gov/gdem.asp>.

Are there better ones, or does this one not contain any elevation data? Does anyone know where there are open source Geotiffs that are good? Or are there open source CSV files that contain the required information, or similar?

ps. I only need the surface data from the mainland, not from the oceans.

**Tags:** climate-models, mapping


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## 1 answers

### Answer by username_1 on 2022-06-21. Score: 7 | Accepted answer

'Better' will depend on your planned usage - any global product will have limitations in terms of overall accuracy and precision, and both the Aster photogrammetric data and the widely used [radar SRTM data](https://www2.jpl.nasa.gov/srtm/) don't have data at the poles. The [Copernicus GLO-90 DEM](https://spacedata.copernicus.eu/web/cscda/dataset-details?articleId=394198) is an alternative. At full resolution these are large datasets, so you may want to seek out a reduced resolution dataset, e.g. the [1km gridded NASA data](https://catalog.data.gov/dataset/srtm30-global-1-km-digital-elevation-model-dem-version-11-land-surface).

> **Comments:**
> **username_0**: Hi thanks for your answer: Is there a Geotiff wich only have the data for the land and not from the oceans?  
> **username_1**: Not sure you will find that in a global model - so you might need to filter a global dataset by a land cover dataset that defines ocean  
> **username_0**: ok sounds complicaded! but thanks  
> **username_1**: Actually I think the 1km gridded NASA data is a land surface only dataset, so I guess fits your requirement  

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