An open source Java software library that provides an object model for Euclidean planar linear geometry together with a set of fundamental geometric function
8
votes
0answers
242 views
Solutions for fast operations on large GIS datasets [duplicate]
Possible Duplicate:
Acquiring ArcGIS-like speed in Postgis
I have been using PostGIS 2.0 for all of my GIS operations. PostGIS is an excellent GIS database, but no matter how I format my ...
6
votes
2answers
196 views
Is it good practice to manage all JTS spatial objects as abstract Geometry instances?
I'm new to all this GIS business, and am developing a Java web app using the JTS library. I'm trying to get my head around the JTS classes and how they're supposed to be used.
I have some existing ...
5
votes
1answer
367 views
Find Perpendicular Distance and Minimum Perpendicular Vector between a Point and a Line using GeoTools and JTS
I have a line formed by 2 lat/lon pairs, and the lat/lon of a point. I would like to find out the perpendicular distance between the line and the point on the Earth surface (can assume Earth as great ...
4
votes
3answers
128 views
Trying to combine nearby points into a polygon
We have collected millions of cell phone strength readings. I am trying to group points of the same strenght that are within a distance of each other in to a polygon. I asked on the
postgis mailing ...
4
votes
2answers
300 views
is there a way to tell if two linestrings “really” intersect in JTS or GEOS
In JTS (or GEOS) you can't tell if two linestrings really cross each other. The result is exactly the same whether the lines simply have a point in common but don't cross or if they really cross.
Is ...
3
votes
1answer
82 views
How can I get KML into JTS TestBuilder?
JTS Topology Suite TestBuilder supports WKT, WKB and GML inputs. What's a quick and easy way to get the geometry for a KML feature into one of these formats for input into JTS TestBuilder?
For ...
3
votes
1answer
87 views
How can i topologically sort 2D triangles and put in an array?
I have a set of 2D triangles in a Geometry array which together forms a
connected strip when placed them according to edge adjacency. However, in
the array they are not in topological order based on ...
2
votes
1answer
43 views
Is there an alternative for JTS TestBuilder on Linux?
JTS Testbuilder, an application for testing JTS functions, is available on Windows and I use it quite regularly. Are there anything like this on Linux? Does GEOS have anything similar to this on ...
2
votes
0answers
156 views
What is the best way to convert WKT String to GML String
What is the best way to programatically convert WKT String to GML String? Every reasonable library (at best available in some Maven repository) can be used.
Till now I came up with this solution ...
1
vote
1answer
34 views
Intersection with JTS Geometry
I want to calculate an intersection between two geometries with the intersection function from JTS Geometry.
What happens, if the geometries have different SRIDs?
SimpleFeature sf1=...; //SRID ...
0
votes
1answer
29 views
geotools / jts crs transformation result not at correct position
I copied the example from geotools, which shows how to transform a shapefile into a different projection. (http://docs.geotools.org/latest/userguide/tutorial/geometry/geometrycrs.html)
But when ...
