12,471 reputation
1167155
bio website maphew.com
location Yukon Territory, Canada
age
visits member for 4 years, 8 months
seen 7 hours ago

hewer of maps, old time techie, newbie developer

woohoo, http://gis.stackexchange.com/ now open to the public!

personal - www.maphew.com
in-between - yukongis.ca
work - www.environmentyukon.ca

profile for matt wilkie on Stack Exchange, a network of free, community-driven Q&A sites


Nov
14
comment Versioning In QGIS
Responding to the "or something else" bit, you might find github automatic mapping and diffing of geojson useful github.com/blog/1772-diffable-more-customizable-maps. Also GeoGig, geogig.org
Nov
14
comment What resampling technique should be used to reproject an altitude raster?
Very good description of resampling methods and when to use them at gis.stackexchange.com/a/2598 and gis.stackexchange.com/questions/17328/…
Nov
4
comment How do I import/export KML to ArcGIS Desktop?
forestGIS this is a new question, or a bounty on an old one. Please ask separately, e.g. "How to get QGIS KML import/export to keep attributes". @Simon the accepted answer appears not to apply, note "user-created attributes from a tablet app are being stripped away when imported by the KML to Layer geoprocess tool." (or perhaps you have info to fold into accepted answer for how to make it work?)
Oct
22
comment How do I fill gaps in a raster to zero value cells?
for an extensive description of the magic formula above see Working with Digital Elevation Models, Patching Gaps by our own @whuber and Assembling DEM Files for Watershed Analysis
Oct
22
comment Correctly merging DEM rasters and eliminating edge effects
given the info above, I'd be tempted to trim or nibble back the common edge to null/nodata so there is no overlap at all and then re-interpolate the gap. See gis.stackexchange.com/questions/79374/… for filling.
Oct
22
comment “muting” first point in a time animation
a kludge would be to insert a point with an earlier-than-all time stamp and setting symbology to draw as transparent (or omitting from symbol settings for rest of points)
Oct
22
comment Change annotation symbol properties in bulk
That's probably why html/css has hex codes; a well established and easy to re-use standard. In any case even though the method is laggy and error prone I've accepted this answer as correct because it's the best we have available right now. Thanks :)
Oct
21
comment Change annotation symbol properties in bulk
Hoping to catch the eye of Esri people I asked on GeoNet: Annotation feature attributes: why is "color" missing?. The silence is profound.
Oct
20
comment Change annotation symbol properties in bulk
Thank you for the tip about selecting the parent node (the "NUTS_.." in the screenshot above) to edit multiple features at once. I didn't know about that. I confirm it does work for thousands of records, subject to the same extra long wait times my "use Drawing tools instead" answer describes. I'm truly mystified why they'd bother to expose Fontname, size, bold, etc, and leave out colour(!)
Oct
20
comment Change annotation symbol properties in bulk
Using Edit Annotation tool and changing a records colour produces zero change in the attribute structure. Other changes such as font name, bold, etc. are reflected. So it looks like I still need to use the Drawing Toolbar approach.
Oct
20
comment Change annotation symbol properties in bulk
Ahhh, these annotation were created back in 9.x era. There's an Update Annotation Feature Class tool which I ran on these data. However "color" is not an attribute. How strange.
Oct
20
comment Change annotation symbol properties in bulk
That's curious, I have a totally different attribute structure. FontName, bold etc. don't exist: i.imgur.com/azt5DY9.png
Oct
20
comment How to preserve the original direction of NHD segments when creating a route using the gp.CreateRoutes_lr tool?
Hi Justin, welcome to our site :) Please expand an on your answer, perhaps with an example. We try to avoid 1 line answers as they usually don't stand the test of time. We want to build a knowledge base that will be relevant for as long as possible.
Oct
20
comment RuntimeError while executing python
Welcome to GIS Stack Exchange :) Use the [edited x time ago] link above to see how I reformatted your answer so the list displays properly. Another improvement is to go beyond bare recipe, try and educate. Something more along the lines of "The error message indicates the wrong version of ___ is installed or can't be located. Try installing the latest from ___ from www.___. For example:...."
Oct
3
comment How to smooth/generalize a polygon in qgis
Nice demonstration of the buffer/de-buffer approach at Paul Ramsey: Removing Complexities
Oct
3
comment Update point coordinates in QGIS after manually moving locations in edit mode
+1 for note about saving to a new format. I was spinning my wheels trying to figure out why the tool was disabled for my GPX layer; save to shape and it's all good. (but -1 because as useful as this answer is, it doesn't answer the question asked: modify location based on attribute value)
Oct
3
comment Update point coordinates in QGIS after manually moving locations in edit mode
see gis.stackexchange.com/q/63114/108 for moving coords by typing new numbers, though this is a one-by-one operation and doesn't answer the question asked
Oct
1
comment Using Label classes vs Definition queries - which performs the best?
Yes, please test (and report back if you can). I also lean to definition queries, but for usability performance reasons. The label expression dialogs are painfully sluggish and several click layers deeper than the def query ones. They're also easier to get at in python.
Oct
1
comment Using Label classes vs Definition queries - which performs the best?
I think your math is mistaken. There is the same number of queries on either case, the Q is is there a performance difference dependent on where the query is placed? (Definition Query or Label Expression)
Sep
29
comment How to account for Colour Blindness when designing maps?
excellent news, thank you!