topic Re: Topo to raster in ArcGIS Spatial Analyst Questions

Topo to raster

ZShein24 — Sat, 27 Mar 2021 13:35:30 GMT

Hello. I am trying to create contour lines in arcmap but when I created raster, it was only showing one colour and of course no contour lines when I created contour lines.

The hydraulic head numbers I used to create raster are quite small, around 16, 17. I wonder if that is the reason. Trying to figured out what could be the reason.

Would be great if you guys could help.

Thank you.

Topo to raster

ZShein24 — Sat, 27 Mar 2021 13:33:10 GMT

Hello. I am trying to create contour lines in arcmap but when I create raster, it was only showing one colour and of course no contour lines when I create it.

The hydraulic head numbers I used to create raster are quite small, around 16, 17. I wonder if that is the reason. Trying to figured out what could be the reason.

Would be great if you guys could help.

Thank you.

Re: Topo to raster

DanPatterson — Sat, 27 Mar 2021 15:26:20 GMT

something seems off with your interpolation, if that what the Capture.JPG is. The range of values in that field would suggest a different result.

If you used

Topo to Raster (Spatial Analyst)—ArcGIS Pro | Documentation

could you elaborate on the options used

Re: Topo to raster

JayantaPoddar — Sat, 27 Mar 2021 15:16:30 GMT

1.JPG is the screenshot of an excel/csv file. Do you also have the same attributes reflecting in the attribute table of the point layer. If you have created an XY event layer, you should export the layer as a shapefile or FGDB Feature Class.

Using the above point shapefile, run Topo to Raster > (Field:Hydraulic_Head) > (Type: PointElevation) > (Primary Type of Input Data: Spot)

You could then run Contour, to generate contour lines from the above Raster Surface.

Re: Topo to raster

DanPatterson — Sat, 27 Mar 2021 15:22:47 GMT

something seems off with your interpolation, if that what the Capture.JPG is. The range of values in that field would suggest a different result