A version of the PostGIS open source spatial database
2
votes
1answer
130 views
generate height data from DTED maps
I have 16 DTED maps of (1 degree x 1 degree). I have to generate combined height matrix of maximum 4 (1 degree x 1 degree) DTED maps in my C++ application.
Can someone suggest to me which open source ...
3
votes
0answers
266 views
How can I properly add PostGIS data into MapGuide Maestro?
I am having trouble connecting a PostGIS database to MapGuide Maestro. Actually, I have added the PostGIS data into Maestro, but when I click to validate the layer it shows an error message:
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1
vote
0answers
103 views
Function for Selecting Points in a Polygon
I've been banging on this for a few hours, but since I'm relatively new to PostgreSQL and PostGIS, I can't find the solution. I'm trying to create a stored procedure (function) which will return all ...
0
votes
0answers
13 views
Can driving_distance return all sets of distance from different starting points at one time？
I'm now using the extension of pgRouting, driving_distance, to search for the distance along the river system：
In the figure, the starting point is 3, but I want to get the distance starting from ...
0
votes
0answers
17 views
driving_distance does not return all sets of distance
As title, I am working with pgRouting, trying to get the distance matrix along the river system.
I use driving_distance function and it seems like I am getting what I want：
But when I check the ...
0
votes
0answers
12 views
pgRouting：routing problems using reverse_cost
I saw this post：Routing issues with pgrouting, and try the ability of reverse_cost.
As the result of this post, if there is only one way to go from one node to another, even though the reverse_cost ...
