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0answers
14 views

Shift between Open layer and vector layer QGIS 2.20 [duplicate]

Can you please help me solve this issue with Open Layer Plugin. I see some shift with a vector layer of Laos water boundaries when the background is Google Physical Layer.I am using CRS EPSG: 32647 ...
2
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0answers
35 views

What C/C++ libraries exist to transform vectors between map projections

Has anybody written a C/C++ library (preferably one that is aware of Proj.4 definition strings) that has a set of routines to convert vector quantities (e.g., wind speed and direction) between map ...
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1answer
37 views

How to detect openlayers feature vector intersections in any zoom level?

I have to change vector feature when vectors are intersect each other, I wrote the following code: // check all vectors features (arrows) in the current layer for intersections allArrowFeatures = ...
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1answer
54 views

How can I add vector tiles to my tileserver?

I created my own tileserver under ubuntu 12.04 as described here: http://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/ now I want to serve the tiles as vectors, I found this: ...
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2answers
320 views

How to scale/reduce my polygon without changing the central lat & long?

I am writing a VBA code to resize my polygon, I get a input as vector points(Shape file). The code below resizes it as according to my scale factor but my central latitude and longitude are also ...
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3answers
2k views

Openlayers vector feature coordinates are not transforming,

I have a OpenLayers vector with a single feature [0]. It's coordinates are in the map projection (EPSG:3413) and I want them in WGS84 (EPSG:4326) decimal degrees. I have the following code which ...
2
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1answer
801 views

OpenLayers: make polygons not zoom

I have a simple OpenStreetMap for which I want to display a series of circles. Each circle represents readership for that area, so its radius will change based on the numbers. However, when I create ...
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1answer
42 views

Is there a way to traverse and select all vectors connected to a starting vector?

Preferably using QGis I'd like to remove errors from a road network .shp file and was wondering if there was a away to perform a flood fill or traversal on a vector layer to select all connected ...
2
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1answer
89 views

Where can I get a comprehensive list of Rules expression operators?

I'm selecting and styling my points layer on a contour map of Philadelphia using Rules Based Styling. (see: Can I use rules based rendering in QGIS to select features?). The filtering process using ...
5
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1answer
628 views

Create a new vector layer that fills space between other polygons in QGIS

I inherited a clipped (500m radius) land cover map containing vector layers of different land cover categories such as buildings, grass, roads, etc from a colleague. The empty (white) space in ...
1
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1answer
514 views

Creating markers(vectors) in openlayers

I'm new to OpenLayers,currently in existing project they have created markers in openlayers map by using following code, // vector layer creation vLayer = new OpenLayers.Layer.Vector(layerName, { ...
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3answers
1k views

Where is the QGIS Parallel Line Plugin?

Somehow I believe to recall there does exist some ind of "draw paralel line" plugin for QGIS. Could anyone please point me to - I cant find it :-/
3
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2answers
1k views

Dynamically adding features with cluster strategy

I am trying to dynamically add features to a vector layer, and use cluster strategy to group those features accordingly. I am able to do this for the first set of data that gets loaded on the map. ...
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1answer
60 views

OpenLayers - vector boxes and paths

I'm using OpenLayers to make warehouse map. How to prevent drawing lines (paths) over some vector objects already on the map?
2
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2answers
784 views

Multiple Maps with Styles not working in OpenLayers

I have created 2 maps(within 2 in a same page) along with their respective style maps. Both maps are having vector layers along with "LineString" geometry... added into them. Both style maps are ...
4
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1answer
3k views

Showing menu based on right click on Point Geometry in Javascript

I have implemented a vector layer(using javascript) in open layers which is having point geometry. Now my requirement is to show menu just besides with the point whenever we do right-click on ...
2
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1answer
1k views

how to get Coodinates after Resizing a feature Openlayers

I'm trying to display the coordinates of a Feature or vector layer after I use the modify radio button to resize my vector, but it does not work, nor on my drag feature. I'm using ...
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1answer
1k views

How to stop or deactivate draw polygon control after the first polygon has been drawn in Openlayers

I want to only be able to draw one circle on my map and then disable the control. Below is my code, Any suggestions? <html xmlns="http://www.w3.org/1999/xhtml"> <head> ...
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1answer
3k views

Openlayers get coordinates of a circle vector after draw

I have made a openlayers map. I have made two features on the map. Navigate DRAW POLYGON I have made 40 sides to my polygon which turns out to be a circle. After I have drawn my circle I want to ...
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3answers
4k views

How to move vectors to specified coordinates in QGIS?

I have a layer of vectors located around, say, (100, 100), and I want to move them to new coordinate like (1000, 1000). How should I do it? Preferably using QGIS.
3
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1answer
1k views

Extract parcel layers from vector pdf

So, I have an interesting problem... I have a PDF file which has over 100 pages and each of these pages is displaying a map in vector format. By using some third party program I was able to find out ...
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3answers
1k views

What is the wire format for Google's new vector map tiles?

Google recently released new vector cartography for their mobile maps. I'm curious if anyone here has any insight into the wire format they use for transmission? I've experimented with a few formats ...