Automatic symbology

Question

hello

I have a shap file (polygons), and I created a model that analyze different data and assign automatically an index to each polygon over time (day1, day2�?�). I would like to assign a color to each index. For example: between 1-4 yellow, 5-8 brown, 8-11 red,�?� etc and use this color index to map the polygon for each day.

Is there a way in model builder to change the symbology automatically based on this color index?

Thank you

LeilaHashemi · Answer

At 10.0 you can do this with arcpy.mappingUpdateLayer.  It requires that you have a pre-authored layer file that you apply to your layer.

At 10.1 we've exposed some symbology renderers (e.g., graduated colors) to the API that allow you to change things like number of classes, ranges, labels, etc.

Jeff

Thank you Jeff, but I am working with ArcGIS 9.3, there is any solution in this version?

JeffreyBarrette · Answer

At 10.0 you can do this with arcpy.mappingUpdateLayer.  It requires that you have a pre-authored layer file that you apply to your layer.

At 10.1 we've exposed some symbology renderers (e.g., graduated colors) to the API that allow you to change things like number of classes, ranges, labels, etc.

Jeff