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location San Antonio, TX
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visits member for 4 years, 3 months
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Programming GIS applications since 1988, primarily using ESRI technology. For more information see my linkedin profile.

My blog is here.


1d
revised How to cartographically represent water flow?
edited tags
1d
comment How to fill gaps in a multipart polyline
see update to preserve gaps larger than tolerance.
1d
revised How to fill gaps in a multipart polyline
added 10187 characters in body
2d
revised Can pgr_dijkstra use a boolean column for routing?
deleted 60 characters in body; edited title
2d
comment Unable to create object class extension COM component?
Of course the best thing to do would be to find the dll and register it in the "GeoObject Class Extensions" category using categories.exe.
2d
comment Unable to create object class extension COM component?
Programmatically this can be done via IFeatureWorkspaceSchemaEdit.AlterClassExtensionCLSID. Not sure of a way to do it through the UI. If it's a personal mdb, you might try looking for a row in the ObjectClasses table for your featureclass, and clear out the EXTCLSID value for that row. Back up your mdb first.
2d
revised Correctly merging DEM rasters and eliminating edge effects
edited tags
2d
comment Unable to create object class extension COM component?
Do you know if these featureclasses relied on custom class extensions?
2d
revised Removing disconnected cells in a stream network raster using ArcGIS
edited tags
2d
revised How to fill gaps in a multipart polyline
added 5733 characters in body
Oct
21
comment Count overlapping polygons in single shape file with R
Here's a rather old VBA solution that leverages map topologies. It could be updated to C#, and maybe python, but not certain. forums.esri.com/Thread.asp?c=93&f=982&t=84656#249735
Oct
21
answered How to fill gaps in a multipart polyline
Oct
21
awarded  Notable Question
Sep
30
awarded  Explainer
Sep
29
revised How to Predict demand on a bus route, considering variaton in kms and price?
edited tags
Sep
29
comment How to Predict demand on a bus route, considering variaton in kms and price?
I think this topic (referred to as "Elasticity of Demand") is relevant. Transit agencies have been accused of raising the price of bus transit (used by captive riders) to offset cost of funding rail transit (used by choice riders).
Sep
25
comment How can I delete relationship classes?
See my update. Sometimes deleting an element can confuse the implementation of the enumerator.
Sep
25
revised How can I delete relationship classes?
added 564 characters in body
Sep
23
comment How to Predict demand on a bus route, considering variaton in kms and price?
Do you have any stats to indicate level of transit captivity? capntransit.blogspot.com/2011/10/…
Sep
23
comment How use DataFrame Geographic Transformation User Interface with ArcObjects?
In arcobjects you can scan the list of predefined geotransformations and see which ones transform between the datum of the source data, and the datum of the dataframe. This is done with ISpatialReferenceFactory2.CreatePredefinedGeotransformations. I'm not sure how to access that from python though.