I am using the ArcGIS web map and need to add a contour map (level curves for Uruguay) to perform a topography analysis. I have seen that in the ArcGIS Online search engine there are some maps of this style for some countries or regions.
How can I make one for Uruguay?
Should I do it in the desktop version and then upload it to ArcGIS Web Map or I can do it online directly?
You can download the SRTM data, using earth explorer platform (https://earthexplorer.usgs.gov/). You will have a 1-arc-second resolution DSM for Uruguay and can work this around with ArcGis or Qgis to generate de level curves that you need.
I recommend you to use a 50m resolution on contour level, that's a good proven threshold for SRTM data quality.
If Uruguay has any DSM data with better quality, you could use to.
This video can help you. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiPlODjjMbzAhVQrpUCHXr8AYAQwqsBegQIBBAB&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dq3iblCHGoZk&usg=AOvVaw0g7M2sDnhpcaebJAY44pMW
