Request for practical advice

[Moussa Brehima Siby]

Hello, my name is MOUSSA BREHMA SIBY. I am a Malian student. for those who don't know, Mali is a continental country in West Africa with Bamako as its capital. I have just started my specialization in geomorphology and I discovered Caesar-Lisflood which I really liked. I read the user manual but the application for a first test does not work. I wish with your good faith to receive practical advice. My first problem is with the insertion of the DEM. I would like you to explain to me the process of acquiring the DEM usable on CAESAR-LISFLOOD. I count on your goodwill. THANKS.

[tom.co...@gmail.com]

Hi Moussa – a good place to start for the DEM is the SRTM data. This can be found in places like here: https://portal.opentopography.org/raster?opentopoID=OTSRTM.082015.4326.1  - there are other options too.

 

You then need to convert the Dem files into a ascii grid format. This is a text file with 6 lines of header  - then the rows and columns of elevation heights separated by a space character. This is a pretty common text format for DEM data.

 

Usually downloaded files are as a geotiff. For this I use ARC-GIS, but this can also be carried out in Open Source/Free GIS packages like QGis or Saga.

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