Tutorial: Catchment delineation using PCRaster Python

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This video is part of the open course Programming for Geospatial Hydrological Applications.
In this course you'll learn an essential skill for researchers dealing with (spatial) data. With scripting you can better control your analysis using command line tools. You can also automate your procedures by writing batch scripts. Furthermore, you can process your data and make models using Python and its useful libraries.
The online learning course on Programming for Geospatial Hydrological Applications is part of the Climate Services for Water Management (CliMWaR) project, funded by the Flemish UNESCO Science Trust Fund (FUST) from the Government of Flanders in Belgium.
The course is available at the GIS OpenCourseWare platform (www.gisopencour...) and the UNESCO Open Learning platform (openlearning.u....
More about PCRaster: www.pcraster.eu
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Опубликовано:

8 сен 2024

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Комментарии : 11

@omkarkadlag8916 3 года назад

Thank you sir 🙏, much needed video.

@felwind14 10 месяцев назад

Dear Hans when a map does not have a coordinate system in PCRaster how can we add it using the command line. With Gdal we should use Gdalwarp?

@HansvanderKwast 10 месяцев назад

PCRaster doesn't need a projection. If you want to add a projection you can use gdal_translate with the -a_srs option and save to geotiff. Not gdalwarp, unless you want to reproject.

@HansvanderKwast 10 месяцев назад

PCRaster doesn't need a projection. If you want to add a projection you can use gdal_translate with the -a_srs option and save to geotiff. Not gdalwarp, unless you want to reproject.

@xinjunding6362 3 года назад

professor hope you could teach PCR-GLOBWB

@walterpaiva7022 Год назад

So if i analyse the rain in my river basin, the mask will be the basin delineation, correct?What should i do to get the average rain time series for this area after interpolation? Could i have images files (png, jpge) from this raster delineated by the "mask"? Thanks a lot for help us

@HansvanderKwast Год назад

You can calculate average by using maptotal and divide it by the number of cells. You can use map algebra with PCRaster, see this course: courses.gisopencourseware.org/course/view.php?id=2&section=4. To export to other formats you need other Python libraries. For example with GDAL you can translate PCRaster to PNG or JPEG, see gdal.org/index.html

@walterpaiva7022 Год назад

Ops, I commented in the wrong video! I will try to get the average of interpolated rainfall timeseries as that lesson! Tanks

@juancamilomontanocaro6246 3 года назад

hi, if I want to create subbasins in the basin, I have to create outlets manually and use subcathment?

@HansvanderKwast 3 года назад

You can use the Strahler order map (result of the streamorder function) and create points where the order changes (you can use the downstream function). Then you get all the outlets. Then you can use the catchment or subcatchment function (not sure what the difference is).

@juancamilomontanocaro6246 3 года назад

@@HansvanderKwast thak you for your answer. I saw the downstream function but I can't understand how to extract the points where the order changes. If you could explain me better I would appreciate it