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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
13
comment Converting GPS coordinates points to polylines
You had tags for ArcGIS and MapServer but they are not mentioned in your question and so have been removed. If they are relevant can you edit your question to explain how, please?
Nov
13
comment How can I display multiple multi-attribute labels for polygons
Would you be able to edit your question to include the GIS software and version that you are using, please?
Nov
13
comment How do you combine multiple spatial functions in one query?
@JohnBarça I agree with you - when I see minimalist questions I'll often sound out more details before I commit any effort to answering - if no engagement results then I think downvoting as a deterrent can be positive for the site.
Nov
13
comment Versioning In QGIS
Please remember from the Tour that one question per question works best here. Your two major requirements are best researched/asked about separately.
Nov
13
comment arcpy overwrite files in a geodatabase file
If this needs to be progressed then I think the next step is to edit your question to include a code snippet that demonstrates the error, and the exact error message that you receive.
Nov
13
comment How do you combine multiple spatial functions in one query?
@Rdvsm Please be aware that GIS SE does not have a policy against homework but its users sometimes exercise downvoting when they see no sign of research on questions, irrespective of whether they are homework.
Nov
13
comment Legend not removed when layer changed
Welcome to GIS SE! To assist potential answerers to help you I would recommend always including your code snippets as text rather than pictures. The format {} button makes this easy to do.
Nov
13
comment ArcGIS Viewshed keeps crashing
Have you tried running the same procedure on a smaller dataset? Please respond to this and the other requests for clarifications by editing your question to revise it with more details about your problem and steps taken to try and resolve it.
Nov
13
comment ArcGIS are two rasters the same? - including null values
This may or may not help but it was my first thought upon reading your question title. You may want to throw the two rasters at Raster Compare (Data Management) and see if the result is useful to you.
Nov
13
comment Why is the performance speed between ArcGIS and QGIS so different?
Welcome to GIS SE! In your answer you do not appear to be addressing the question "Why is the performance speed between ArcGIS and QGIS so different?" and instead are only stating tour measurement of the QGIS 2.6 performance. Consequently, I am going to convert it to a comment.
Nov
12
comment How to set feature coordinates to values in attribute table?
Would you be able to edit your question to include the feature type (points, lines or polygons) of your shapefiles, as well as some details about how your shapefiles "were produced programatically", please?
Nov
12
comment How to create a simple Web-Application using ArcGIS-Server?
In particular this answer by @AlexTereshenkov which recommends ArcGIS Viewer for Flex or ArcGIS Viewer for Silverlight for web editing via ArcGIS for Server.
Nov
12
comment Issue with da.updateCursor on shape
Are you able to include a standalone, working, Python code snippet that illustrates the symptom that you are describing? Everyone volunteers their time here so requiring them to look at an earlier Q&A to try and synthesize the question risks narrowing your field of potential answerers.
Nov
12
comment Where to store Raster data?
You seem to be asking multiple questions here which is not as per the Tour.
Nov
12
comment GetParameterAsText() with Cursor
Have you configured your tool dialog to provide your script with the parameter value? It sounds like you are trying to run this straight from an IDE. Check out resources.arcgis.com/en/help/main/10.2/index.html#//… and in particular resources.arcgis.com/en/help/main/10.2/index.html#/…
Nov
12
comment Does ModelBuilder have Iterate Field Values bug when model run without being in Edit mode?
I almost overlooked your suggestion to test using shapefiles and guess what? They worked! I don't think its the Windows Update because all my data is local rather than on a shared drive.
Nov
12
comment Does ModelBuilder have Iterate Field Values bug when model run without being in Edit mode?
Thanks again @Hornbydd - I think I'll just test again after 10.3 is released. It's not important enough for me to uninstall/reinstall on this one and although I think that should make no difference it is about all I can think to try now. Feel free to write a short answer saying that you've tested and cannot reproduce. I'll be happy to accept it to reward your testing efforts.
Nov
12
comment How to create polygon made from outside points of points shp?
In particular the answer by @JasonScheirer that recommends Bruce Harold's Concave Hull Estimator looks like it may be exactly what you are after.
Nov
12
comment Metrics of change between vector datasets
The Data Comparison toolset is worth being aware of.
Nov
12
comment Difference between MapBox and CartoDB
I think you are still asking for a list of differences between MapBox and CartoDB and by reading the duplicate Q&A I could find two or three without much trouble. To focus your question I think it needs to be more along the lines of "With respect to this key requirement ... how do MapBox and CartoDB compare?" or "I've tried meeting this requirement ... using MapBox/CartoDB without success, how does CartoDB/MapBox handle it?"