12,561 reputation
1064147
bio website maphew.com
location Yukon Territory, Canada
age
visits member for 4 years, 4 months
seen yesterday

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


Mar
7
comment Is it possible to get arcpy on 9.3* or Qgis? Or maybe some of the functions?
If you own both arcgis 9.3 and 10 there is no legal reason not to backport. Technically though I think you are in for a world of pain. ESRI themselves initally publicised that v9 & 10 could be simultaneously installed. They pulled that very early in the beta period, which indicates to me it caused too many problems. The bigger question is why do you want to backport?
Mar
7
comment Why do you use ArcGIS for Desktop?
@Chad yes we used publisher for a couple of years. We found the overhead of maintaining two datastores and two parallel ses of map compositions too expensive. It was ok for one-off maps but ones which need to be updated there was a lot of duplicated effort, making a change on the published map and then making the same change in the analytical datastore, or vice versa. I was unaware they added the ability to read file geodatabases. I wonder how they did that without the file-gdb API? That might change things.
Mar
3
comment Hover/Popup feature problem
@shitake, to format code properly, select the lines in question and slap [Ctrl]-[K]
Feb
28
comment Tiling Vector data without losing geometrical and topological information
We have Operational and Warehouse db's. The operational have many relational tables, and little to no duplication across tables. The warehouse db's are flattened, no relationships, many duplicated fields, but fast -- no calculations on the fly. The trick is automating the process from Analytical to Tiled, with no user intervention. Essentially what ArcMap does in it's new on the fly basemap layer feature, and Google Maps & Tilestache and friends: Grab feature classes X,Y,Z in the area of interest, throw out all their intelligence, mash them into a dumb bitmap (saved in cache), and draw.
Feb
24
comment What raster-based GIS systems really work?
@markus, thanks for letting me know there is way to use non-grass rasters directly. I'll definitely give it another go next time I have some raster analysis to do.
Feb
24
comment How to change feature class and field aliases in bulk?
@Jasperiod, I moved most of Mark's snippets into a module I call parco, which is where OpenFeatureClass is also. I don't remember creating it myself, but maybe I did. Anyway, there it is at line 125.
Feb
16
comment How to split polygons without ArcView?
@mbarretts, you say what software you don't have, Arcview, but you don't say what you do have. Also do you mean each split poly has to have the identical area , as in numerically identical # of sq km's for each feature? Because fishnet will not do that, some fishnet squares will be entirely within the parent poly, and others will only partially overlap.
Feb
14
comment How to calculate Topographic Ruggedness Index in Arcgis?
Thank you Bill. I appreciate seeing the specifics of how a tool or operation works. From this anyone with a suitable investment of time and intellectual energy can build a new apparatus to carry this job out using the tools they have at hand. It's information like this which will make GIS.se a useful service in the long haul.
Feb
14
comment How to calculate Topographic Ruggedness Index in Arcgis?
I know I asked for an arcgis specific solution, but I'm accepting this one because of it's directness. GDAL Utilities are easy to acquire and install, universally acknowledged as best in class, and the command to generate this particular product is the definition of simplicity.
Feb
11
comment How to cut a 'tiled image' from a raster dataset using GDAL?
@vadp, @markusn, @mapperz & everyone else - please be descriptive. In addition to the link a sentence or two as to why you think this tool is worth looking at and what differentiates from the others will be helpful. We want the answer to be useful in the future as well as right away. Sooner or later link-rot strikes and if all we have is the url it's hard to find where the project incarnated next.
Feb
9
comment What will GIS be like in 5 years (and in 50)?
I've changed it to community wiki, but I actually think it should be closed and moved to GIS chat. Why? Because humans are incredibly poor at predicting the future, especially when it comes to technology and it's uses. I just don't think it's possible to have "good" answers, in the Stack Exchange sense. I chose the wiki route because as moderator I can't vote to close without actually closing.
Feb
8
comment Listing all feature classes in File Geodatabase, including within feature datasets?
thanks gotchula! That's the first time I've encountered the yield statement, had to do a bit of reading to figure it out. You forgot to note your sample is for arcgis v10.
Feb
8
comment Call FWTools (ogr2ogr) from ArcGIS python script
It's okay to mark your own answer accepted. I'm glad you figured it out, I have far too many of those "Doh!" over a single misplaced character myself. :)
Feb
7
comment What is the difference between DEM, DSM and DTM?
In this context raster and/or vector are merely the storage format or representation method, not a defining characteristic. A DEM can be represented as points or a triangular irregular network (TIN) and a DTM as seamless raster surface. Downvoters: please take the time to state why you think an answer is inappropriate so posters have an opportunity to learn -- especially when they're new here.
Feb
3
comment What methods are there to produce map tiles for google maps?
related: gis.stackexchange.com/questions/5101/using-gdal-to-cut-tiles
Feb
2
comment What methods are there to produce map tiles for google maps?
Thanks Mark, I didn't know about that aspect of FME server. Also thanks for disclosing your relationship to FME.
Jan
19
comment How to install ArcView3 on 64-bit Windows?
re: copy all files - was everything needed under C:\ESRI\\* or did you have to grab some files from elsewhere (I think I remember reading something about fonts and dll's).
Jan
19
comment How to install ArcView3 on 64-bit Windows?
What platform did you use for the VM approach? (e.g. MS's xp-mode vmware, virtualbox, etc.)
Jan
19
comment Partially updating raster (DEM)?
Although the question is DEM specific, the challenge and solution is not. The same process can be applied to any set of raster (image) layers. Thanks for bringing it up Tomek.
Jan
18
comment common task in mapping applications
@mwalker +5! post as an answer and get your dues :)