Tagged Questions
14
votes
4answers
747 views
What is the best open-source web mapping solution for handling 3000+ polygons
I have 3000+ polygons which represent watersheds (18 main watersheds). At the first stage all the 18 watershed will show and their list will be placed in the left sidebar. If any user mouse over the ...
2
votes
0answers
119 views
how to automate changing polygon's shape while keeping its area the same and limiting deviation from orginal centroid?
I have a polygon that was digitized based upon visually interpreting underlying values of rasters/vectors that represent a natural environment (soil type, surface roughness, slope, elevation, ...
7
votes
5answers
365 views
Where can I get neighborhood boundaries?
Besides Zillow's creative-commons licensed neighborhood boundaries shapefiles, what sources of neighborhood boundaries are there? Not just in the US, but all over the world.
Free/open source is ...
4
votes
1answer
785 views
How to create a polygon from other polygon boundaries?
I want to write an algorithm that creates a polygon inside a hole made by a set of other polygons. It's something like a flood fill and it's like the "boundary" tool in Autocad.
The image shows an ...
3
votes
2answers
140 views
How to bring polygons closer to a point?
I have some scattered polygons with a lot of space between them.
I want to make a thematic map but all that white space doesn't look very good, so I want to bring the polygons closer to the center of ...
10
votes
3answers
714 views
Polygons from Polylines in either ArcView or FOSS
I have 20,000 polylines in a .gdb that represent about 5,000 building footprints. Some of the building footprints have pretty substantial gaps (image below). I would like to snap the polylines closed ...
3
votes
4answers
307 views
Creating Polys and Displaying geo points within. ( Where to start? ) [closed]
Hey all,
I'm somewhat of a newb when it comes to creating mapping solutions. I've stayed on a pretty high level playing with openlayers and pulling data from various webservices.
The first part of ...
3
votes
1answer
1k views
Converting tax map polygons from Shapefile to table of map number and corner coordinates
Fairfax County, Virginia provides a Shapefile here which shows the boundaries of the tax maps as polygons. Each polygon simply consists of four corners, and what I'd like to do is create a table ...
