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Community Moderator for Geographic Information Systems SE

Moderator Pro Tem for Genealogy & Family History SE.

Freelance ArcGIS Specialist & GISP-AP with 25+ years Esri software experience, working where possible with Geoprocessing (including GP Services), ArcPy/Python, Open Source GIS, OGC Interoperability, OpenStreetMap, Zoology & Genealogy.

Author of:

  • ArcGIS for Desktop and Google Earth eLearning videos which are available via Discover Spatial
  • Introductory to Advanced level ArcGIS for Desktop and ArcPy training courses which are available Instructor-led or Self-paced - see PolyGeo website

Available for commercial ArcGIS consulting, training and support assignments, and willing to provide quotations to tackle any intractable ArcGIS for Desktop and ArcPy problems which appear on GIS Stack Exchange when they may be unsuitable to resolving expediently using its focussed Question & Answer format.

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Nov
11
comment How to split polyline using points WITHOUT splitting at intersections?
Would you be able to edit your question to include diagrams of what you are getting vs what you are wanting, please?
Nov
11
comment Definition queries deleting themselves in ArcMap10.2
Definition queries are one part of ArcGIS for Desktop that I have never had cause to doubt. I would look for anything that causes layers to be removed/added or maps to be overwritten. In both cases a layer without a definition query could be taking the place of another you set one for. Also, look for any ArcPy or ArcObjects code that may be removing definition queries by setting them to ""
Nov
11
comment Does ModelBuilder have Iterate Field Values bug when model run without being in Edit mode?
@Hornbydd Thanks for testing - can you confirm your version? Your test sounds accurate and I tried both feature layer and feature class as inputs. I'll start my test from scratch after a reboot tomorrow to see if I have better luck.
Nov
11
comment Determining GIS data accuracy
Check out the qa-qc and data-quality tags.
Nov
11
comment Modelbuilder Iterator on Table
Would you be able to edit your question to revise it with those clarifications, please? To learn how comments and questions interact I recommend meta.gis.stackexchange.com/a/3353/115
Nov
11
comment Calculate value from an equation using Field Calculator Python/VB Script
Would you be able to edit your question to show what you have already tried in the Field Calculator, please?
Nov
11
comment Using if else statement in Python Parser of Field Calculator in ArcGIS for Desktop?
It's always best to edit your question rather than trying to include code in comments - your formatting options there are far superior. This Meta answer may help with framing and interacting on your questions.
Nov
11
comment Determining Y coordinate for Create Fishnet from desired Angle of Rotation in Python/ArcPy?
@TForward I think both those links seek to meet requirements considerably more complex than the one described in your question.
Nov
11
comment How to split points by polygon?
You say "The split tool would be ideal if it allowed points." - but (without testing) I am confident that it does. Your split features must be polygons but your input features have no such restriction.
Nov
11
comment Determining Y coordinate for Create Fishnet from desired Angle of Rotation in Python/ArcPy?
Are you able to translate the maths at that link into Python code for the question's asker? If so, that is something I would be keen to upvote, and I bet you would get accepted.
Nov
11
comment Determining Y coordinate for Create Fishnet from desired Angle of Rotation in Python/ArcPy?
Is your problem that print math.tan(math.radians(60) * -114.09341083433694) * -114.09341083433694 returns 11.1963055307 when you would expect it be much closer to -114?
Nov
10
comment Distinguishing between table and FC using arcpy, when exporting from SDE
It's hard to answer an ArcPy/Python question that does not include a code snippet to illustrate your precise procedure, and where you are stuck with it.
Nov
10
comment I want to register points on a pdf and export to a geotiff
Would you be able to edit your question to state whether the output GeoTIFF is just four points, or your PDF map with four points added to it, please? At the moment your title appears to contradict what is in your question body.
Nov
10
comment I want to register points on a pdf and export to a geotiff
@MichaelMiles-Stimson +1 Second method seems by far the simplest if ArcGIS for Desktop installed and GDAL not.
Nov
10
comment What application server or web framwork to use
What is your key requirement on the application server side? What are your experiences with PHP, PHP framework(Symfony), Python (GeoDjango) and Java that make choosing one over the others not an obvious choice? Answering these within your question should help focus it to something less broad.
Nov
10
comment Dissolving adjacent polygons and adding attributes
Could you edit your question to include the GIS software and version that you are using, please ?
Nov
10
comment Do you have some reference to create WebGIS?
I've put this on hold because you have not indicated that you are aware of this Q&A which may provide some useful background for you. If it does not, and you have a more specific question, then please edit your question to include precise details of what you have tried and where you are stuck. Perhaps review questions tagged mapfish, ms4w or postgis on this site too if they are mandatory parts of your stack.
Nov
9
comment Calculate Field based on two fields using python
It's also not clear whether you have been inconsistent with your indent levels. To me it looks like a one space indent before if and two more spaces before return.
Nov
9
comment Calculate Field based on two fields using python
You do not say the error returned but I think the problem is that you are using "= =" when it should be "==" (in two places).
Nov
9
comment How to import `numeric` fields from csv to dbf in ArcGIS?
Rather than delete your question I would recommend that you write a short (about a paragraph) answer to summarize the solution. Self-deletion of questions can be done but they can be viewed negatively by some of the site's algorithms.