Latest Contributions by BrittaSchroeder

Situation: I want to determine if I can aim an antenna at a satellite from a given location and still receive satellite signals without surface obstacles (e.g., mountains) blocking the antenna. The antenna azimuth would be 146° (magnetic) and the antenna elevation would be 19°. Question: I believe the Skyline Tool holds the answer, except that I do not know how to account for the 19° elevation of the antenna within the tool. I've attached a sketch of what I think may hold the answer: taking the sin of the antenna angle and the distance to the nearest mountain, determine the elevation in meters that the antenna must clear and compare this to the height of the peaks. The problem is that foreground foothills and lesser peaks may still obstruct the angle of the antenna, and I want to conduct this exercise on more than one peak, but all surrounding surfaces from 140° to 150° (magnetic). ... View more

I am having a difficult time understanding geometry as a concept accessed by the da module. For example, I created a new feature class using the clip geoprocessing tool. I want to update the "HECTARES" field, as well as add a "Shape_Area" field that is updated with Shape@Area geometry. arcpy.Clip_analysis(fireLayer,refugeLayer,outLayer) arcpy.AddField_management(outLayer,"Shape_Area", "DOUBLE") updateRows = arcpy.da.UpdateCursor\              (outLayer,["HECTARES","Shape@Area"]) for row in updateRows: #fields --> 0:Hectares, 1:ShapeArea     HA = row[1]/10000 #Area in hectares     row[0] = HA #assign value to each row of Hectares     row[1] = ["Shape@Area"]     updateRows.updateRow(row) #save it by using the updateRow function del updateRows # unlock cursor del row #remove cursor pointer This code will update my "HECTARES" field if I comment out the line     row[1] = ["Shape@Area"] which leads me to believe that while row[1] remains empty, it still has access to the Shape@Area geometry. Thanks. ... View more