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| bio | website | |
|---|---|---|
| location | England, United Kingdom | |
| age | 37 | |
| visits | member for | 2 years, 11 months |
| seen | 8 hours ago | |
| stats | profile views | 125 |
I am a GIS Consultant. I love C# and Java type languages and have dabbled in VB a long time ago.
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Jun 6 |
awarded | Notable Question |
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Jun 6 |
revised |
Quick way to make a convex hull Update of findings. |
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Jun 5 |
comment |
ListFeatureClasses brings back more than expected Yep, tried both, same result. |
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Jun 4 |
comment |
ListFeatureClasses brings back more than expected Doesn't work, tried with just an "*" and "Point", it still brings back all point featureclasses and all grids. |
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Jun 4 |
asked | ListFeatureClasses brings back more than expected |
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May 10 |
comment |
Quick way to make a convex hull @whuber - yeh, those are really good ideas - I think the only drawback on this methodology are the actual spatial and attribute selection functions - they take an absolute age!, and I have put a spatial index on the point featureclasses! However this may be due to fact SDE is running on a crappy desktop box, I am now in the middle of transferring the data onto a proper server with the appropriate SDE tuning for vector data. I will feed back when I get a result. PS - I think it may be worth writing this up as an answer then I can award you the points etc. |
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May 10 |
comment |
Quick way to make a convex hull @whuber - I have put your idea into Python code now and it seems to have worked excellently for a feature class of 11 million points - it cut down the processing to 750K points and the convex hull was perfect. Now doing a 16 million one, but alas no luck yet - I have applied a new spatial index in the hope it will speed things up. |
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May 10 |
comment |
Quick way to make a convex hull @Hornbydd - I didn't actually know that, but thanks, I will look into that. |
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May 8 |
comment |
Quick way to make a convex hull @whuber - yep totally agree with your thoughts. Just trying to work out whether your original idea would work...there's definitely something it it :) |
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May 8 |
comment |
Quick way to make a convex hull @whuber - the performance issue is: looping through ALL the points in the search cursor to put them into an array in order to make a multipoint out of them - that takes a crazy amount of time! |
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May 8 |
comment |
Quick way to make a convex hull No - using Oracle. That's an option, to use the database side - but I'm just working through Python at the moment. |
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May 8 |
comment |
Quick way to make a convex hull No - I am creating a convex hull FROM the points, but first you must create a mulitpoint first, then call the convexHull() function. |
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May 8 |
asked | Quick way to make a convex hull |
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May 5 |
accepted | ITopologicalOperator and Z Values |
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May 2 |
awarded | Popular Question |
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Mar 13 |
asked | Comparing SDO_GEOMETRY to ST_GEOMETRY in reference to measuring distance within features |
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Oct 31 |
comment |
How to migrate an extension from ArcGIS 9.3.1 to 10? @KirkKuykendall - yep, that microsoft article worked for me too - it was so obvious in the end (NOT!). Thanks, this has been a lifesaver. |
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Sep 25 |
awarded | Popular Question |
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Jul 22 |
awarded | Yearling |
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Jun 29 |
asked | Best practice for using users loading data into ArcMap from SDE |
