Latest Contributions by DavidChevrier

I can't seem to locate how to change the default label of the ClassBreaksRenderer.  I can change the symbol, but not the label for the legend for data that does not fall within the scope of the breaks. ... View more

I posted this in the general mapping section, but prob should have posted it here in the developer.  Can I get any ideas please? ArcXML/ArcIMS equivalents in python/arcpy - creating points and lines ... View more

I need to update an old script that uses ArcIMS and ArcXML into modern day python and arcpy.  This script runs in perl, but the part I need to recreate has to do with creating graphics layers on the fly.  Given some lat/longs, how do I create them as points, then draw lines between them, and then symbolize them how I want? In perl, I create the xml I want, then send it to the server pretty easily as seen below: In this code I create the points and lines based on an array of lat/longs Then I send the request to the arcims server which is hosting a basemap that these are drawn on and export a jpeg: This seems much harder than it should be in python.  The script I've come up with so far is below.  It creates a points layer and adds it to an existing map (which works fine), but I cant change the symbols.  Basically I just want to use a text letter for each point.  The other tricky part will be creating the lines from it.  I will use the script and tool in arctoolbox, but this is really a ton more work and I still don't know how to change the symbols.  The only idea I came up with is to add a dummy layer that is symbolized how I want but turned off, then apply that symbology to the newly created letters.  But that won't give me the dynamic creation I need.  (These scripts do a bunch more, I just tried to simplify it here.)  At the end it exports a jpeg of the map. import arcpy import os import uuid arcpy.env.overwriteOutput = True templateMxd = r"C:\location\to\my\mxd.mxd" mxd = arcpy.mapping.MapDocument(templateMxd) # list of lat/longs ptList = [[-82.1, 29.51], [-80.07, 31.13], [-82.97, 31.96], [-86.12, 27.71], [-82.9, 25.25]] pt = arcpy.Point() ptGeoms = [] for p in ptList:     pt.X = p[0]     pt.Y = p[1]     ptGeoms.append(arcpy.PointGeometry(pt))     tempPoints = os.path.join(arcpy.env.scratchGDB, 'tempPoints') arcpy.env.workspace = arcpy.env.scratchFolder arcpy.CopyFeatures_management(ptGeoms, tempPoints) arcpy.MakeFeatureLayer_management(tempPoints, "Start_Points") arcpy.SaveToLayerFile_management("Start_Points", "Start_Points.lyr") tempPointsLayer = os.path.join(arcpy.env.scratchFolder, 'Start_Points.lyr') addLayer = arcpy.mapping.Layer(tempPointsLayer) df = arcpy.mapping.ListDataFrames(mxd, 'Layers')[0] arcpy.mapping.AddLayer(df, addLayer, "TOP") lyrExtent = addLayer.getSelectedExtent() df.extent = lyrExtent output = 'WebMap_{}.jpg'.format(str(uuid.uuid1())) Output_File = os.path.join(arcpy.env.scratchFolder, output) # Export the WebMap arcpy.mapping.ExportToJPEG(mxd, Output_File, df, df_export_width=500, df_export_height=500, resolution=150) # Set the output parameter to be the output file of the server job arcpy.SetParameterAsText(1, Output_File) del mxd, addLayer, lyr ... View more