A coordinate-based data model that represents geographic features as points, lines, and polygons.

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1answer
80 views

Snapping one vector layer to another

Is there anyway to snap one set of vectors to its nearest neighbor vector in another feature class? For example, I have a road feature class and a feature class of bridges and I want to snap the ...
0
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0answers
49 views

GeoServer 2.6 + PostgreSQL 9.3.5, GeoServer becoming unresponsive

We're displaying point vector data on a web client using an OpenLayers (2.12) WMS layer... rendered via a GeoServer SQL View reading from data in PostgreSQL. The particular layer has a viewParam on ...
0
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1answer
104 views

Apply an sld to a vector layer in OpenLayers

I'm trying to apply an sld style to a vector layer in Openlayers. I already took a look on google and here and I got a lot of informations, but still I don't manage to achieve the result I'm looking ...
0
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0answers
36 views

tilestache - bounding box - bbox

I am trying to configure Tilestache in a way that I could be able to ask the Postgis server from client... with bounding box... and in response I would like to get geojson. I would like to try with ...
1
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2answers
238 views

In OpenLayers 3, how do I draw an extent as a LinearRect?

In OpenLayers 2, this was an easy feat. I was able to simply instantiate a LinearRect given the coordinates of my BoundingBox, and then add the LinearRect as a feature to a vector layer I had added to ...
0
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1answer
74 views

Openlayers stylemap label not working wfs

I have created a style map like following: var scadaPointStyle = new OpenLayers.StyleMap({ "default": new OpenLayers.Style("null", { "rules": [ new ...
6
votes
1answer
1k views

Easily calculate “roundness/compactness” of a polygon

I am trying to find ways to quantitatively describe the shapes of various polygons. For my project, these polygons represent lakes, rivers, lagoons, and parks. So they can be almost any shape. One ...
1
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2answers
798 views

Drawing pie charts with vectors on OpenLayers?

Is anyone got any examples of drawing pie charts with vectors as markers on OpenLayers ? Cheers,
11
votes
3answers
17k views

Extract Raster Value into Polygon Attribute

I have Raster Data for a State which has Elevation Data in its pixels. I also have Vector layer which has the 300 divisions of State. what I need is, I want to get the average elevation value of ...
1
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1answer
55 views

ArcGIS feature class interprets Latitude/Longitude in meters instead of degress

I wanted to tie toegther some data from my database table to an ArcGis map. The table contained an Object_Id, GIS_LATITUDE and GIS_LONGITUDE column. I added the feature layer based on the table (x as ...
1
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0answers
62 views

QGIS field calculator expression: selecting min/max values within field groups

I am new to using QGIS (previously used Arc) and trying to get my head round the expressions and Python. I have series of polylines representing routes and require the linear distance from the ...
0
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0answers
29 views

Metrics of change between vector datasets

I have an old and a new set of parcel data which I'm looking to compare. I'm looking to compare changes in individual parcel geometries, so boundary/corner adjustment. Currently each parcel we have ...
0
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2answers
54 views

How to make openlayers features externalGraphic reappear after hiding

I'm displaying a vector layer with pois, generated from a text file: lat lon icon iconSize iconOffset title description 56.030325 14.4774116666667 ...
2
votes
1answer
31 views

Raster origin is incorrect, does not properly overlay with vector in same CRS

Two layers, both allegedly WGS84, one vector layer of the Midwestern US, one raster layer with coverage of the entire US. The vector layer renders correctly (coordinates are correct), but the raster ...
12
votes
5answers
4k views

Convert GeoPDF to a vector format

I want to convert a GeoPDF that has vectors entity in it to a vector format and preserve the real coordinates of these vectors. The GeoPDF has been exported from ArcMap and has layers in it. I have ...
1
vote
1answer
168 views

How to eliminate polygon boundaries

I'm working in both ArcMap and Grass I have a problem with the boundaries or the edges of my vectors. The vectors are a result of object segmentation (called classification) in Grass Gis. In Grass, ...
1
vote
2answers
136 views

Hiding specific icons/markers on text generated vector layer

I'm displaying a vector layer with pois, generated from a text file: lat lon icon iconSize iconOffset title description 56.030325 14.4774116666667 ...
4
votes
4answers
6k views

Looking for an annotated vectorial map of the world

I'm looking for an annotated vectorial (PS/SVG/...) map of the world (+countries). Wikipedia contains many vectorial maps (e.g: http://commons.wikimedia.org/wiki/Category:Blank_SVG_maps_of_the_world ...
5
votes
1answer
608 views

How to emulate a specific vector grid in QGIS?

I would like to analyze data included in a pdf file. The file contains information on characteristics of 16km grid cells for a specific study area. The file also includes a map displaying the grid. I ...
1
vote
1answer
33 views

Access vector layers features

I have an openlayers vector layer with features added from a text file. I am now trying to access these features via their attributes (if layer.features.attributes.some_attribute equals to something ...
1
vote
1answer
91 views

“Node tool: could not snap to a segment on the current layer” message

I have a strange issue. Editing a layer with node tool I get always the following message: "Node tool: could not snap to a segment on the current layer." This error happens to me even with a fresh ...
0
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0answers
75 views

Where can i get OSM water polygon for lower zoom level?

i wants ocean (water polygons shapefile) for generating vector tile map. Initially tested using shape file openstreetmapdata it works fine. But at low zoom level i produce pbf file with higher size. ...
1
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0answers
84 views

Free implementation of Polynomial Approximation with Exponential Kernel (PAEK) algorithm

I need a Free (i.e. Open Source) implementation of the Polynomial Approximation with Exponential Kernel (PAEK) algorithm, preferably in C, C++, Python, Julia or R. The algorithm is one of the methods ...
2
votes
1answer
295 views

Creating buffers that will not overlap in QGIS

I am dealing with a .shp with a number of points in it. The distances between points range from ~300m to 5km. I wish to create a 1 km buffer around each point with as little overlap as possible. Each ...
2
votes
0answers
34 views

how to display 2 wfs layer at the same time from mapserver?

I have two wfs vector layers. When i show only one layer, it works. But doesn't work when i'm trying to show 2 wfs layers at the same time. How to show 2 wfs layers together? I'm using OpenLayers. ...
4
votes
4answers
5k views

Merge overlapping lines in ArcGIS

I have a polyline shapefile containing a number of lines, some of which overlap. By overlap, I mean that they follow exactly the same path for some of their route, but also have bits that are not ...
4
votes
3answers
145 views

Can you recycle shp and shx files in shapefile fishnet (vector grid) where only dbf data changes?

I'm periodically getting data from an external partner that is bound to a very large fishnet (vector grid) in shapefile format. The fishnet itself sits at around 400~ megabytes, but the only data that ...
3
votes
1answer
75 views

One vector data layer with different styles in QGIS

I have one layer of vector data that I would like to show in two different styles. Is there a way of accomplishing this in QGIS? I've solved it now by duplicating the the vector layer and add ...
0
votes
2answers
100 views

Openlayers 3 Vector Layer error

Getting error from Firebug on running this code: TypeError: f is null (ol.js 409) The map is showing up properly. After adding the line : this.map.addLayer(vectorLayer); I get the mentioned ...
3
votes
2answers
2k views

How to subtract Geometry Point Polygons in OpenLayers?

I have two json arrays, one for background polygon and one for other polygon. And from them, I got two polygon layers. backgroundLayer = new OpenLayers.Layer.Vector("Background Layer", {styleMap: ...
3
votes
0answers
39 views

Still no fictional geographies in some GIS format? [duplicate]

I'm actually reviving Are any fictional worlds available in some GIS format? from 2011 as I'm hoping the Game of Thrones fever has boosted people's interest in drawing fictitious countries in some GIS ...
2
votes
1answer
52 views

How can I properly clip a shape file to get the section I want using QGIS?

I've tried the other "how to clip" instructions here, but consistently get an empty shapefile from the clip. QGIS Version: 2.4.0-Chugiak OS: MacOS 10.10 Input File: San Diego (South Map) 1999 Topo ...
0
votes
1answer
85 views

ArcGIS Linear referencing tools duplicating records and erroneous measures

I am using LocateFeaturesAlongRoutes_lr, MakeRouteEventLayer_lr, and MakeRouteEventLayer_lr to combine three different overlays into one based on this question I asked month ago. The code is as ...
0
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0answers
22 views

Exporting QGIS Raster/Vector layers into one PDF? [duplicate]

I have seen a similiar post to this a while back (Is it possible to export GeoPDF from QGIS?), and thought I would try asking it again to see if there has been any improvement or new knowledge on ...
0
votes
1answer
183 views

OpenLayers 3 drag and drop interaction with custom projection problem

I am trying to add layers by using drag and drop interaction. Here is jsfiddle.http://jsfiddle.net/anuket/umdwzn10/ It almost works, I mean new layer is added, but for Geometry it gives "NaN". Geojson ...
0
votes
1answer
49 views

Add Marker on the polygons' centre using Openlayers?

I have written a code to draw polygon from the WKT format.Now I need to add the marker at its centre. In the following code I have passed the centre and shape in WKT format(extracted from database). ...
1
vote
2answers
195 views

Openlayers 3 detect the layer by mouse move

I wanna do something like this ; Openlayers 3 Vector Layer Example But I don't want to one layer, 3 or more layer on the map and get feature like the example. How can I seperate the layer ...
1
vote
3answers
29 views

Checking for proper administrative location?

I would like to ask you about one case. I have two vector layers. The first layer contains points. This layer has a lot of fields with data like name of district, voivodeship etc. The second layer ...
2
votes
1answer
63 views

Non-default icon of OpenLayers Vector Feature

thats propably some minor problem, but i have deadline above my head and i can't get any clue whats wrong with my code, so I decided to come here for help. Im changing from markers to vector layer and ...
1
vote
0answers
157 views

How to get feature on vector layer in Openlayers 3?

I'm try to get feature of a vector layer, but I'll have 3 or more Vector layer. When I click the map, I didn't get the feature. My vector layer definition; var vectorAltAlan = new ol.layer.Vector({ ...
4
votes
1answer
120 views

Removing some bands or layers from a tiff using gdal

I have been working on a multiband raster image. It is a pix image. I need to just work on the 26 bands that are raster files and not the 4 bitmaps that are are also included in the pix image. I could ...
2
votes
1answer
89 views

Opening shape file in OpenWind

In QGIS I have used the OpenLayers plugin to locate a wind farm. I have then used the add feature function to place a point at the base of 7 turbines. I have saved the shape file as an ESRI Shapefile. ...
4
votes
1answer
612 views

GDAL polygonize lines

I have a raster file containing roads (left image). I polygonize the raster file with GDAL (see the script below). In the end I like to have vector lines. However GDAL only gives me something like ...
3
votes
2answers
123 views

Interpolation on set of points in QGIS

Is it possible to perform Interpolation in QGIS with input as a vector layer which has a set of points collected following a specified path?
2
votes
1answer
84 views

Openlayers creating RegularPolygon that is too small then return false

sorry my English very pool and just can type few word... My project has to use imagelayer to show map , it can create box on map, box will be a area to put device marker on top , but when the box ...
3
votes
1answer
120 views

How to find mean coordinates of a cluster of points from a point layer in QGIS?

I have a set of coordinate points. The points are distributed in such a way that some points are clustered around a specific area. There is an option to find out mean coordinates(s) of the whole point ...
1
vote
1answer
81 views

How to calculate raster data in vector area?

I have two layers. One is a layer of USA ecoregions (there are 9 ecoregions). It is not raster (so it's vector?). The other layer is the National Land Use Data set (so I know where there's ...
0
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0answers
10 views

How to re'display feature after using my 'filterFeature()' function?

The code below is a function that hides a certain region in the map. The problem is that I can't redisplay it. I've tried by removing this line: wfs2.features[i].style = {visibility:'hidden'}; but ...
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0answers
90 views

Help embedding Openlayers map in Eclipse BIRT report

i have this code, it displays the zoom buttons only but it doesnt display my map. what could be the problem? <html> <head> <script ...
2
votes
1answer
37 views

How to make my PostGIS vector layer in QGIS visible?

I have loaded a shp file (simple polygon with one entry) into PostgreSQL 9.3 (with extention PostGIS v2.1.3). I now want to load this layer into QGIS (v2.2.0 Valmeira) via the "load Postgis layer) ...