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

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2
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1answer
37 views

What is the fastest way to digitize features on a map?

I'm currently using QGIS basically to trace a bunch of polygons to show individual ponds from google maps. Some of the geometries can be pretty oddly shaped and using the nodal digitizing tool gets ...
0
votes
2answers
33 views

Using raster to clip vector data

I have high res raster data covering 2million km sq, with a field where each cell has a value from 0 to 100. I need to create a "mask" using the cells with a value over 12 in that field. I then need ...
0
votes
0answers
28 views

raster and vector misalignment

my vector and raster datasets align perfectly fine in Arcmap but not in QGIS, any suggestion on solving this dilemma is very much appreciated.
1
vote
1answer
67 views

From CSV file (latitude and longitude fields) to point .shp

How i create a new point shapefile from CSV table? If i have a CSV file with a latitude and longitude fields, is there a method for to have in output a puntal shapefile?
0
votes
1answer
44 views

QGIS 2.6 - creating contours from points

I can't find the example model "contours from points" in QGIS 2.6. Is there another tool for creating contours from points, besides the QGIS Contour plugin?
0
votes
0answers
12 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
votes
1answer
26 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 ...
-2
votes
0answers
38 views

Totaling Population within A Polygon

I am trying to count total populations within several arbitrary polygons using census block data. How can I get a total number per polygon?
0
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1answer
53 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
votes
1answer
13 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 ...
1
vote
1answer
29 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
vote
0answers
27 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
votes
0answers
27 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
votes
1answer
67 views

Sources for free vector meteorological data [closed]

Does anyone know where I can find freely distributed data: In vector format, e.g. shp file. Forming polygons, not lines or simple points. Representing any meteorological event or state: ...
2
votes
1answer
24 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 ...
0
votes
2answers
32 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 ...
1
vote
1answer
154 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
1answer
23 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
36 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
votes
0answers
42 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
vote
0answers
42 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 ...
1
vote
2answers
50 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 ...
2
votes
0answers
29 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. ...
3
votes
1answer
62 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
57 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 ...
2
votes
1answer
39 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 ...
3
votes
0answers
38 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 ...
0
votes
1answer
53 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
votes
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
63 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
25 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). ...
0
votes
0answers
23 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
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 ...
1
vote
2answers
93 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
0answers
77 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({ ...
2
votes
1answer
77 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. ...
3
votes
2answers
101 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
76 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
69 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 ...
2
votes
1answer
49 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
1answer
30 views

Pyqgis How to merge all the active layers? or layers in the registry?

I was wondering if there is a way to merge multiple layers. I actually would like to merge all layers in the registry programmatically, all of them are point layers and have the same fields. I have ...
1
vote
0answers
48 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 ...
4
votes
1answer
67 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
19 views

How to style a Vector layer in QGIS using a numeral of an attribute

I have a simple vector layer in QGIS that I would like to style with numerals based on the ID attribute. For instance, point with ID 1 will show up as the numeral 1. Is this possible with default ...
3
votes
2answers
47 views

How to clip vector data from raster data?

I have two files: National land cover data (raster) HUC 8 (vector files of watersheds) Both are national scale but the HUC 8 takes up a larger geographic region than the raster set so I want ...
1
vote
1answer
54 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 ...
2
votes
1answer
33 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) ...
0
votes
1answer
24 views

Why isn't Mapbox viz styled how it is in projects?

When using the Mapbox "Projects" editor, I'm finding the previews do not style the same as the end results on the page. Is anyone experiencing similarly? In Projects, my map looks like on the left. ...
1
vote
1answer
60 views

Why doesn't my Mapbox + Leaflet viz look retina-friendly?

This is probably a very simple question but it's not clear to me. The Mapbox docs say: When you create a project from the editor, Retina (high resolution) tiles are automatically used on ...
2
votes
0answers
76 views

How to merge overlapping and duplicate lines from vector layer to one single line?

I used the "polygone to line" tool from QGis, to get a line-layer from this polygon-layer: unfortunatly this causes overlapping and duplicate lines, after I broke the qgis-export via GRASS into ...