Tagged Questions

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

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0
votes
2answers
23 views

add a vector point on OSM map

I have managed to show Lat and Lon function init() { navigator.geolocation.getCurrentPosition(function(position) { document.getElementById('myloc').innerHTML="Latitude: " + ...
3
votes
1answer
70 views

Are there plans for improving performance of vector files in QGIS?

Does anybody know if there are any improvements planned pertaining to the performance of vector files in QGIS? Right now, a 1 GB file with contour lines needs several minutes to open. In addition to ...
3
votes
1answer
89 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 ...
3
votes
1answer
94 views

How to measure the distance of multiple points to a line

I have two shapfile in QGIS to which I am trying to find the distances between. I have a shoreline which is a vector line and then I have hundreds of data points in the ocean. What I am trying to find ...
1
vote
1answer
35 views

Stamp out and transfer values from one overlayed vector layer to another

I have a vector layer with administrative boundaries and another vector layer with postal code boundaries, which are more precise/smaller entities/objects. I now want to transmit the values of one ...
1
vote
1answer
112 views

How to export 2d vector graphic from Arcscene?

I need to know how to export 2d vector graphic from ArcScene so I can edit it with illustrator. I've tried changing the options when I export 2D scene as AI file or PDF file, but they always remain as ...
1
vote
1answer
116 views

Color depending on attribute

I'm trying to set the color of a vectorlayer feature depending on the feature attributes with PyQGIS. How do you acces the attributes of a vectorlayer feature?
0
votes
1answer
27 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 ...
0
votes
1answer
79 views

Drawing pie charts with vectors on OpenLayers?

Is anyone got any examples of drawing pie charts with vectors as markers on OpenLayers ? Cheers,
5
votes
0answers
91 views

Moving points onto lines (~neighborhood)

I do have two vector layer, of which one is a point layer based on "events" by remote sensing and the second one is a line layer from local research. In my case these are earthquakes and tectonic ...
5
votes
0answers
206 views

SEXTANTE toolbox - GRASS error

I am trying to use the SEXTANTE module GRASS (and SAGA) for vector analysis but whatever function I use I always get the same error:"Could not load layer: G:/closest.shp Check the SEXTANTE log to look ...
4
votes
0answers
69 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 ...
4
votes
0answers
76 views

How to download Leaflet vectors in GPX format?

I would like to use the leaflet.draw plugin to allow users to digitize vectors on the map. At the end the data should be downloadable as a GPX-file. Is there any sample that shows how this can be ...
3
votes
0answers
75 views

Is there a way to create raster by interpolating point values using GeoTools 8.2?

im new in using GeoTools (8.2). I was able to create shp from asc file which contains my data. Now my question is is there a simple way to create (interpolate) a simple shapefile (only points) to ...
3
votes
0answers
697 views

How to get turn angle, line orientation and line length in ArcMap 9.3.1?

I am mapping and analysing animal movements using arcgis 9.3.1 along with Hawthorne Beyer's GME, and am trying to utilise the correlated random walk commands, but in order to do this I need to find ...
2
votes
0answers
163 views

popular solution for display both tiles and vector data in android map app

We are planning to build a location based app like google map in android. We have some experiences in the PC development,that's to say we have a similar javascript api like google map javascript api, ...
2
votes
0answers
63 views

Is there a way to create a catalog of vector layers in ArcGIS?

Is there a way to create a catalog of vector layers in ESRI? We have thousands of tiles of 25cm contour data which we need to individually find and add to maps. It would be so much easier if there was ...
2
votes
0answers
35 views

Is there a tool for automated quality assurance for vector data captured on raster data?

I wonder whether is any tool(or script) in ArcGIS or QGIS which allows to make an automated quality assurance for vector data captured on raster data? vector data on binary raster:
2
votes
0answers
190 views

how to search a vector/wfs layer

I'm using Geoserver/PostGIS/openLayers I've succesfully set a vector layer. And now I'm trying to create a search functionality. But something goes wrong. First I set up the layer and add some basic ...
2
votes
0answers
88 views

How to Create a Vector Field from Separate u and v Data Files?

I am using Quantum GIS and trying to create a vector field using data from two separate netcdfs. One contains the u data, one contains the v data. Can this be done, and if so, how? Thanks. Jason
2
votes
0answers
64 views

problem with saving to esri file

I was using Wroclaw 1.7/GDAL 1.9(earlier release)/Grass 6.4/GSL 1.15-2 and started getting the following message when saving any item to esri format. "Export to vector file failed. Error: creation of ...
2
votes
0answers
181 views

Reclassifying a field in vector files in ArcGIS

ArcGIS has a reclassify tool that works with Raster files only. Is it possible to have the same functionality for a vector file? On the basis of one of the fields in a feature class, the tool ...
2
votes
0answers
114 views

Overlay Shapefile onto Geotiff

I have a Geotiff map and I want to overlay a Shapefile onto it. Ideally I want to specify a 'nice' style for the polygons e.g. have them opaque (for now all polygons should be the same). I want to ...
2
votes
0answers
889 views

How to deactive Vector Selection In OpenLayers wms features

This is my sample code and work fine :), But I have a little problem, I'm using multiple layer (WMS), when I zooming the layer will be shown or hidden. In my example bellow when OpenLayers level zoom ...
2
votes
0answers
243 views

Creating a sidewalk map for a walkability survey

If I wanted to do my own walkability survey of my city, what tools could I use? I have map data from OpenStreetMap, but I have to consider that streets have two sides (which aren't always accessible ...
2
votes
0answers
858 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 ...
1
vote
0answers
38 views

Base station coverage analysis in QGIS

I want to find base station coverage for a instant location. I have building data. And i determine optimum coverage as 500m far away from a base station (buffer). So how can i find optimum base ...
1
vote
0answers
42 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: ...
1
vote
0answers
118 views

How to update polygon field with point count for multiple rows? (Temporal point-in-polygon)

I have a shapefile with several regions. It contains basic info like ID, Code, Name1, Name2, etc. It is overlaid with a shapefile of points (nearly 200k). Each point represents an event with a type ...
1
vote
0answers
74 views

How to config geoserver to read style of vector layer from postgis/SQL store?

I've imported vector layers from map info pro to both SQL server and post gis using easy loader. In both cases I've included style column in the exported table. When I create new store in geoserver ...
1
vote
0answers
43 views

SQL server 08 Limitations

The Soil SURvey GeOgraphic (SSURGO) database is a set of very large and complicated shapefiles. We want to load all of the shapefiles for the US into a national SQL database. Are there import ...
1
vote
0answers
49 views

calibrating vector line in qgis

I have loaded GPS points into a QGIS vector layer. I also imported a vector line from a dxf file which doesn't have georeferencing. I would like to fit in line geometry between the GPS points - how ...
1
vote
0answers
135 views

Qgis 1.9 on Ubuntu 12.04 constant crashes as soon as I try to do anything

I can get a google earth physical layer open but as soon as I try to open a vector file it crashes-just goes away-no error message, nothing
1
vote
0answers
241 views

Vector layer shifted on OSM map: why?

I've defined the following map: Proj4js.defs["EPSG:31258"] = "+proj=tmerc +lat_0=0 +lon_0=13.33333333333333 +k=1 +x_0=450000 +y_0=-5000000 +ellps=bessel ...
1
vote
0answers
109 views

Polygon symmetry detection

I was wondering if there was any way to create main axis (axis of symmetry) lines for polygons. I have polygons that represents buildings. I will want to find main axes (axis of symmetry) for those ...
1
vote
0answers
133 views

Can I overlay layers in Dealul Piscului 1970 and WGS84 in QGIS?

I have a 10 Gb ECW file (mosaic of a whole county) that is in Oblique Stereographic projection with Datum: Dealul Piscului 1970. The problem was that no matter the Default CRS for new project was, ...
0
votes
0answers
11 views

what is the alternative of setZoomLevel in vector based map

It is commonly used to generat map tiles at a certain scale and re-organize them for web map on pc. For example googlem map, and bing map. Then user will use the setZoomLevel(int level) or something ...
0
votes
0answers
46 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
0answers
30 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
0answers
26 views

Can QGIS transform a set of XY coordinates to a new set reconciled to UTM coordinates?

I have a large data set of coordinates (in meters) measured on the ground relative to a set of trails in Peru. These were generated in the 1990s with a tape measure, and there are about 3000 of them. ...
0
votes
0answers
45 views

What vector file type yields the greatest detail with the Heat Map plugin?

I'm using .shp files built from .csv files and having quirky results. Perhaps there is a better way to begin. The heat map appears to be accurately describing the data but calculates a huge area in ...
0
votes
0answers
76 views

Display a single country with OpenLayers

Can I display a single country using Openlayers? I'm not trying to restrict zoom levels or . I want only one single country to be displayed. The rest of the world cannot be displayed. My reasearch ...
0
votes
0answers
61 views

OpenLayers move each vector feature of layer by constant pixels away from center

I am stuffing a lot of features, each from a different layer, onto exactly the same point, so the visual result is somewhat confusing and it is necessary that some graphics have some offset of ...
0
votes
0answers
114 views

OpenLayers allOverlays with Vector Layers only

In OpenLayers I want to create a map from Vector data only like in the example http://openlayers.org/dev/examples/all-overlays.html . My code is the following: var map function init() { ...
0
votes
0answers
31 views

interpolation layer stops adding vertex

in qgis i m using vector layer and adding the vertex in interpolation layer but it only creats two point layer and the vertex are not added. provider= layer.dataProvider() if len(self.points)==2: ...
0
votes
0answers
168 views

Power line and/or power station vector (shapefile) data in Turkey

Looking for transmission power line / power station vector (shapefile) data in the country of Turkey. KML/KMZ files would also work. Found great vector data here yesterday for roads, rivers, etc: ...