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11
votes
2answers
249 views

Where can I find historic country border data?

I am looking for border polygons from World War I (from 1914-1918). Is there a resource out there that maintains this kind of information? Any help would be greatly appreciated!!
4
votes
2answers
377 views

How to trim Landsat 5 scene edges

I have a bunch of Landsat 5 scenes that I want to mosaic together. However Landsat 5 scenes have a zigzag pattern on the left and right edges as well as some bad data values along these edges. Is ...
3
votes
3answers
275 views

Extracting polygons along a border

I have a shapefile of United States counties. Suppose I am interested in all counties in Georgia that border North Carolina and all counties in North Carolina that border Georgia. And, in ...
2
votes
1answer
225 views

How to meassure the length of common edges between polygons?

I have a shapefile that contains several polygons which in fact represent the limits of several counties. My task is to find each length of each shared border. So in other words I want to know how ...
2
votes
1answer
222 views

How to overlay my interpolation within the boundaries of Quebec?

I am trying to create interpolated maps within geographical borders. I have the coordinates and values to the points I am trying to interpolate. I also have a map of the geographical land mass in ...
2
votes
0answers
27 views

How to change the order of a raster in order to create mosaic with MosaicPro (Erdas 9.2)?

Is there a way to reorder the input files so I can control which ones are on top of the others?
1
vote
0answers
11 views

District border join in Google maps

I am developing a district editor for cities. The idea is that we divide the city into districts. I am using GoogleMaps, but any other js library is acceptible. Problem 1: districts are connected ...
1
vote
0answers
27 views

How does one define the empty space between lines and polygons in an ESRI BIM file?

I have an ESRI BIM file which has a substantial amount of empty, undefined space between features such as as wall boundaries, stairwells, and door spaces. In trying to manipulate this file in order ...
1
vote
1answer
54 views

How to represent two fields of the same states or district layer using different color borders and fills in QGIS?

If I had a set of data in QGIS that was gradually shading a state or district the exact way I wanted -- but I also need to portray more information about that state or district with additional colors, ...
0
votes
3answers
140 views

Which US zipcodes map to more than one state or more than one city?

I'm using a zip code listing, and I am curious to know how many (or which) zip codes map to more than one US state or US city? For instance I know that 42223 resolves to the same city which straddles ...
0
votes
1answer
62 views

matching a border of one polygon to another [duplicate]

I have a polygon (A) that I drew the eastern border of in QGIS. I have another polygon(B) whose western border I want to nest against the eastern border of polygon a so they are touching but not ...
0
votes
0answers
17 views

World country borders in polygon geometry format [duplicate]

Possible Duplicate: Where do I get territories data? Is there some source I can get all world countries polygon geometry points with latitude and longitude? I find it for USA states but ...
0
votes
0answers
32 views

Historic country borders in GIS format? [duplicate]

Possible Duplicate: Is there a source for historical shapefiles and tiles? Does anyone know of a good source for historic country borders, in a GIS file format, like shapefiles? I've been ...