New answers tagged

10

There is a difference, and I recommend the typology presented by Lindsay (2015) be used. Lindsay (2015) presents a typology which defines a pit as a single cell in a DEM whose elevation is below that of the surrounding cells and a depression as a region of cells which drain inwards to a pit. This is consistent with the definitions used by O'Callaghan and ...


2

It depends on what coordinate system you're using. If you are using a projected coordinate system (with units in meters or feet), you can use the field calculator (use the Python parser) with this expression: math.hypot(!SHAPE!.firstPoint.X-!SHAPE!.lastPoint.X, !SHAPE!.firstPoint.Y-!SHAPE!.lastPoint.Y) Or if you want distance on the earth's ...


2

You can use Feature Vertices to Points tool with the option to put the points at the Start and End of the line. Then use the Near tool or the Point Distance tool, this will then give you the linear distance between the end and start point. This can be added to a model to automate it. ...


1

It's not clear from your image if you want to extract all the cells along the edge, what you have numbered. Only 3 & 5 end at the blue barrier whilst 1, 2 and 4 run alongside and I presume flow off the edge at their downstream limit? You do not state which GIS system you are using! So I shall assume ArcMap. Here is one suggested work flow, there may be ...


0

The database is the main problem. If you want to solve this problem create a new geodatabase or copy the original geodatabase from your document folder to your currently working on project folder. Then set the copied geodatabase as default geodatabase and start sinking. notice: After creating the new windows account run the ArcMap for the first time then ...


0

There are a few more steps steps you must take. Use the Flow Accumulation (Spatial Analyst > Hydrology tools) tool to create a flow accumulation grid. Create a stream network using the raster calculator tool (Spatial Analyst > Map Algebra). You should enter a funtion like: SetNull("[Flow Accumulation Grid]<[flow accumulation threshold],1) [brackets] ...


0

Found my error using a slope raster in percentage rise rather than degrees.


0

This is a rather old question, however you might still like an aswer to it. I don't think you can use a GIS-only approach for your problem. What you need is a precipitation / runoff model. If you want to use the SCS curve number method for runoff calculation, I could recommend the following model to you: SWAT Model For this model you will need at least a ...



Top 50 recent answers are included