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visits member for 3 years, 6 months
seen Dec 18 '13 at 23:44

Jun
15
asked Python console not loading with QGIS1.7-Ubuntu 10.04.2 LTS lucid,
Jun
13
revised Creating a small web-mapping/map-tiling service
added 241 characters in body
Jun
13
answered Creating a small web-mapping/map-tiling service
Jun
13
comment Creating a small web-mapping/map-tiling service
How many polygons in your shapefile do you have? If its under 1000, maybe @Mapperz's comment on a vector solution is the way to go. The simplest solution is to use the Google Maps API to draw polygons and create information pop-up windows--no need to create and store non-interactive tiled images. Tiled images of a map are best for highly dense information such as showing satellite imagery, roads, or census tract boundaries.
Jun
9
revised Where can I find polygon data of wine (viticulture) areas and their main grape or varietal?
added 48 characters in body; edited title
Jun
9
comment Where can I find polygon data of wine (viticulture) areas and their main grape or varietal?
@underdark Best attribute: type of wine (grape or varietal). Nice attributes to have: Place name, elevation, soil.
Jun
8
revised Where can I find polygon data of wine (viticulture) areas and their main grape or varietal?
added 124 characters in body
Jun
4
comment Where can I find polygon data of wine (viticulture) areas and their main grape or varietal?
I opened the dbf. There are 20,000 polygon areas of vineyards accross Europe--very comprehensive-- but I did not see any attribute information associated with the vineyard areas, just alpha-numeric ids. Any chance you know where the data that links to these alpha-numeric ids might reside?
Jun
2
comment Where can I find polygon data of wine (viticulture) areas and their main grape or varietal?
Thanks. I am downloading it now!
Jun
2
asked Where can I find polygon data of wine (viticulture) areas and their main grape or varietal?
Jun
2
revised What tools for regionalization/redistricting can you recommend?
changed URL link since library is now hosted on Google Code
May
29
revised How to calculate purchasing power on postcode level?
added 93 characters in body
May
28
answered How to calculate purchasing power on postcode level?
May
17
answered What tools for regionalization/redistricting can you recommend?
May
14
answered What is a best practice way to display/feed US census/tiger data into Google Maps API?
May
4
revised How do I figure out if there are clusters of one set of points around another set of points from a different layer?
deleted 578 characters in body
May
4
awarded  Commentator
May
4
comment How do I figure out if there are clusters of one set of points around another set of points from a different layer?
@whuber You're right. After reading your above comment, I have decided my Simple Plot Idea will not provide much information, at least as it was described, so I have removed it so as not to confuse people. I now believe Joint Count Statistic is the simplest method to approach the problem.
May
3
comment Spatial statistics tools : clustering analysis on raster data
A measure of artificial light would be a good proxy for urban conditions. A google search should find example studies.
May
3
comment How do I figure out if there are clusters of one set of points around another set of points from a different layer?
@whuber 1st thanks for the explanation of the problem of Ripley's K function. 2nd, when we see a plot of stock prices over time, we can look for general trends up or down or random, also we can pick-out times that there were large decreases or increases and ask why. A plot of how the concentration of buildings changes as distance changes can be used in the same manner. It can be used to search for spikes in concentration, which is evidence against a random distribution, also it can be used to focus further investigation of curious spikes.