A coordinate-based data model that represents geographic features as points, lines, and polygons.
1
vote
0answers
28 views
Looking for best practice to connect multiple road vector line layers for routing (pgRouting) purposes
The Data I have:
Bridges (line layer)
Municipal_roads (line layer and does not include information in Bridges)
State_roads (line layer that doesn't include Municipal_roads or Bridges)
Question:
...
0
votes
1answer
41 views
Give Properties to a shapefile to be used by another person [duplicate]
I have bedrock geoology data. I want to classify the data so it appears with the same propeerties as it does on the suppliers website.
Is there a way i can attribute a property to a layer (in this ...
3
votes
1answer
63 views
Visualizing Spatial Query
I'm new to GIS applications and trying to figure out what options I have for visualizing spatial query results that combine raster and vector data using OpenLayers/GeoExt/GeoServer/PostGIS.
A ...
0
votes
0answers
26 views
Reset style on select Leaflet polyline
Using Leaflet, how can I reset a polyline to it's previous color after it was selected? I have the following function that has been applied to each polyline when constructed:
function ...
0
votes
1answer
23 views
NVS Vector Stream Tool installation problem
I can't the NVS Vector Stream Tool working (version for ArcGis 10.0) in ArcGIS 10.0 SP4. I cannot find any associated toolbox. I have tried System Toolbox, My Toolbox, looking in the installation ...
4
votes
1answer
41 views
Extract Z information from different vector layers in ArcMap 10.1
I have 2 different vector layers, Layer A detailing the area of different polygons and Layer B having similar size polygons with z values instead. I would need to combine Layer A with Layer B so that ...
0
votes
0answers
24 views
OpenLayers Vector Line Feature hard to select
I have a measurement control on an OpenLayers map which allows the user to (unsurprisingly) measure lines and areas on the map. They draw the line/area they want, OpenLayers does the measurements ...
0
votes
2answers
51 views
GRASS: populating attribute table with specific values
I have a vector map that includes 100 points. These points were created using v.extract to randomly sample a larger map of 10k points. As such, the 'cat' values range from 1 to more than 10k. What ...
1
vote
1answer
29 views
GRASS: shift point locations in a random direction
I have a vector map that contains 100 points. For each point, I would like to shift it 250 units in a random location. It's easy enough to shift all points in a specified direction using
v.edit ...
0
votes
1answer
17 views
Is it possible to update layer source in qgis
I've loaded a few shape files as layers in qgis, and I'd like to make a duplicate of the project and all associated shape files into a single directory. However, all of the layer sources are still ...
2
votes
2answers
124 views
How to find the middle point of a line in QGIS
I am trying to locate the coordinates of the middle point of a line feature in QGIS. I tried searching online but can't seem to find an easy way to do this.
0
votes
1answer
36 views
render kml 10mb KML file cordinates data on OSM map throws stop running script error in OpenLayer.js file
I am trying to render the kml file having 18000 line string data on OSM map using openlayer HTTP strategy.
To render OSM map i am using GeoExt.MapPanel and ExtJS 3.4 viewport.
The problem is I am ...
4
votes
0answers
65 views
Assigning costs to a road network : use raster or vector?
I have a road network in a PostGis database (db_routing). In another database (db_environment), I have some spatial features of the surrounding environment (trees as points and water bodies as ...
3
votes
1answer
214 views
What is the difference between Vector and Raster data models? [duplicate]
From: http://support.esri.com/en/knowledgebase/GISDictionary/term/vector%20data%20model
vector data model: [data models] A representation of the world using points, lines, and polygons. Vector ...
0
votes
1answer
63 views
Openlayers Linestring over edge of map
im trying to create a route displayer for ships. But im struggling with the edges of the map. When going from ie. 179* to 2* it displays a line across the entire map, instead of displaying it on the ...
