python script for Viewshed analysis

TanjaHumar — Wed, 28 Sep 2011 10:40:24 GMT

Hi,

I have written a wee python script to carry out viewshed analyses for each point of a point feature class.

In the point feature attribute table, I have added OFFSETA, OFFSETB, RADIUS1 and RADIUS2 as variables for the viewshed analysis.

However, it doesn't pick up those variables but uses the defaults (RADIUS1=0 etc). If I generate the viewshed manually it works, but not with the script.

As the point feature class contains hundreds of points, I certainly don't want to generate each viewshed manually! Any help is very much appreciated!!

Tanja

P.S: this is the little script, that works fine otherwise
# Import arcpy module
import arcpy

# Check out any necessary licenses
arcpy.CheckOutExtension("3D")

# Local variables:
dhm = "C:\\dhm_combined"
Standorte = "C:\\Standorte_3_test.shp"

cur = arcpy.SearchCursor(Standorte)

for row in cur:
    feat = row.Shape
    print row.Nr
    turbine = str(row.Nr)
    vs = "D:\\arctemp\\vs_manuell_"+turbine

    # Process: Viewshed
    arcpy.Viewshed_3d(dhm, feat, vs, "1", "FLAT_EARTH", "")

del cur, row

Re: python script for Viewshed analysis

JeffreySwain — Mon, 10 Oct 2011 12:13:55 GMT

Can you indicate what version of the software you are using? There is a bug report for version 9.3.1, but it is indicated that it is fixed in version 10. If you are using ArcGIS 10, please create a support incident to report this behavior.

topic Re: python script for Viewshed analysis in 3D Questions

python script for Viewshed analysis

Re: python script for Viewshed analysis