1
vote
1answer
422 views

How to tell SharpMap to display polygons based on z-order?

I have a series of polygons which overlap in spatialite. Each has a an attribute providing it's z-order as well as the output color for that polygon. What do I need to do, processing-wise, to allow ...
3
votes
2answers
3k views

Converting NZMG (or NZTM) to latitude / longitude for use with R map library

I am a statistician with no background in GIS so apologies for the newbie question. We routinely use R for a range of statistical and graphic analysis and are interested in using its map library to ...
2
votes
2answers
427 views

Convert Georeferenced imagery to vector data using python

Are there any opensource tools I could use to take a projected georeferenced image such as a jpg with world file, that is UTM projection such as NAD83 and convert it into distinct vector polygons ...
3
votes
1answer
773 views

Geocoding failure on concurrent requests with arcgis-10.0

I've created a small python synchronous geoprocessing script (ctagc) that runs on AGS. The script accepts a table (GPRecordSet) as an input parameter. The script then calls ...
9
votes
3answers
1k views

Intensity/Bubble Map

So I have been tasked to create a visual map of case volume shipped to each region from each of our warehouses. I think the most effective way to visualize this data is to create an intensity (bubble) ...
14
votes
7answers
743 views

What is the best/easiest way to obtain temporal Landsat imagery?

It's been awhile since I've dealt with optical imagery. I need to perform a land cover classification at mid-latitudes using several LANDSAT scenes. I've noticed that some online tools are still ...
0
votes
0answers
80 views

Having trouble deploying WebADF 10 to Windows Server 2008 (64-bit)

I am in process of migrating a WebADF 931 app to 10 and facing some challenges with depoloyment on 64 bit Server (Windows Server 2008 R2). The website works fine when deployed to 32 bit server but ...
9
votes
1answer
906 views

Referring to NaN or ±∞ (special floating point values) in ArcMap definition queries?

I have by chance discovered how ArcMap displays special floating point values to the user. +∞ (positive infinity) is displayed as 1.#INF –∞ (negative infinity) would supposedly be displayed as ...
-1
votes
1answer
132 views

GeoPortal Managing Tool [closed]

i know in this site everybody more or less have been setup a geoportal for showing their basemaps and analysis on local or net for their workers or conserned people in the net. it is obvious that in ...
2
votes
2answers
163 views

After two buffers operations (+/-), why is the result file bigger than the original?

First file ( .shp ) had 1000KB, after 2buffers ( buffers on polygon, 1st buffer +100, 2nd buffer -100 ( small things near polygon should be removed )) in quantum gis file grown to 1500KB, and after ...
4
votes
2answers
426 views

Spatial Indexes on OS MasterMap Data

What are the optimal settings for setting up a SQL Server 2008 Spatial database with full UK OS MasterMap data in? Seperate tables for the different feature types, or a single table with everything ...
1
vote
1answer
366 views

Openlayers dynamically label polygon segments

My requirement is to show dynamic label on polygon feature's segments with some offeset. The label text should have the rank of each segment. If it is a square which starts at top left corner it will ...
5
votes
2answers
3k views

Using OpenLayers (with OpenStreetMaps) and PostGis for rendering data acquired from GPS tracking device?

I'm researching and planing to acquire data from GPS device and store them in postGIS database, then use geodjango to process/work them out and finally chart them on a map with OpenLayers. Will these ...
13
votes
3answers
2k views

How does Nearest Neighbor Image Resampling work in ArcGIS?

I am trying to understand how nearest neighbor for the resampling of Image datasets works in ArcGIS. The output raster cell value is the value of the closest cell value in the input raster: In this ...
21
votes
5answers
4k views

Is there any model builder in QGIS or other open source GIS?

Like the ModelBuilder of ArcGIS for Desktop to run simultaneous geoprocessing tools, is there any model builder available in QGIS or any other open source GIS software?
1
vote
1answer
343 views

How do i create menu in base toolbar?

i'd like to create menus in a base toolbar like arcHdro tools or spatial analyst . how can i create menus with arcengine 9.3 in my toolbar ( the toolbar shows in arcmap )?
0
votes
1answer
154 views

Selection not displaying all results in QGIS

I have a point layer. Of which I have just selected 15 points from the attribute table manually and say show selected attributes. Of these 15 one point does not get highlighted the rest do fine. When ...
1
vote
2answers
2k views

How to save project with data source path as relative in QGIS?

Is their an option in QGIS to save the project with the data source being relative path. I Dont see the option here.QGIS Wroclaw1.7.3
2
votes
1answer
2k views

How to vary the infoWindow size for different feature layers

I have multiple feature layers on the map, and I wish to display a different sized infoWindow for each layer. As far as I can tell, the map has one infoWindow, which can be resized using: ...
6
votes
1answer
6k views

How to change Leaflet Map panes layering order (z-index)?

Leaflet maintains that the Map panes elements contain all layers added to the map. The difference between many of the Map panes is strictly the z-index order of layering. I would like to use a ...
2
votes
1answer
531 views

Is it possible to replaceDataSource of layer with dataset stored in_memory using ArcPy?

I use in_memory workspaces to speed up some Python script tools that get published as Geoprocessing Services significantly. The tools open MXDs and perform, among other things, an ExportToPDF. In ...
3
votes
1answer
4k views

Path to proxy.cgi for GeoServer is not accessible in browser

There have been several questions very similar to this asked already (including ones not involving GeoServer), but their solutions have not solved my problem. I am trying to use getFeatureInfo on my ...
4
votes
1answer
2k views

How to list all of the contents of a geodatabase with arcpy?

This seems like a simple problem, but I have not found a way to accomplish it. I am writing a script that needs to record the paths of everything inside of a geodatabase to a text file, and later copy ...
2
votes
2answers
694 views

How to install GDAL with TIFF support on Linux?

I am trying to install GDAL on a linux machine and tested some sample commands like gdalinfo --version This worked fine, but when I started working with images like .tif I got the following error . ...
1
vote
0answers
384 views

Retrieve tile path of superoverlay in Google Earth Plugin using Javascript

I've created a superoverlay using MapTiler and am displaying that in a webpage with the Google Earth plugin. I'd like to identify the current tile (level, x, y) being displayed with a mousemove ...
6
votes
3answers
1k views

How is a “Map Package” created programmatically?

Given a loaded map document (mxd) how do I find the geodatabase objects related to the contained layers? I want to copy them with the map document so the map can be moved onto each user's local ...
7
votes
1answer
2k views

Incorrect date displayed with Esri JavaScript API v.2.6

I am working on a site that is using version 2.6 of the Esri Javascript API. I have an info window that displays some date information, and the date is one day behind the date in the database. For ...
5
votes
1answer
4k views

How to parse polygons from GML in OpenLayers?

I'm reading a GML file from an URL. This file contains polygons. I would like to draw the polygons on a map, where each should have a different color. But all examples I found on the web so far seemed ...
5
votes
2answers
6k views

How to change the WMS Background Color in OpenLayers?

I am using geoserver to serve up an image pyramid basemap. I want to have all areas outside of the data extent be black (instead of white). I have the map displayed inside of a div tag and changing ...
2
votes
1answer
545 views

Can I move selected features in ArcMap with arrow keys?

I would like to be able to move features by small (preferably predefined) increments using the keyboard arrow keys? Can this be done?
1
vote
0answers
179 views

Trouble programmatically publishing to SOM when SOC is on another machine [closed]

I wrote a desktop extension for ArcMap that allows a user to publish the map they've just created to an AGS 9.3.1 machine on another server. This works fine as long as the AGS machine acts as a SOM ...
2
votes
2answers
3k views

Can two polygon layers be merged in QGIS on a common id?

Can two polygon layers be merged in QGIS on the basis of a common id? Update: Ok , the dissolve tool works fine. But for instance lets say I have 10 polygons. 8 of them are together , so when ...
3
votes
1answer
920 views

How to use the pgRouting TSP function?

For more than two days I'm trying to make the TSP algorithm work in PostgreSQL/PostGIS. My problem seems to occur when I'm trying to take into account the road network for TSP algorithm. I know that ...
11
votes
2answers
3k views

Is it possible to get the EPSG value from an OSR SpatialReference class using the OGR Python API?

When reading a layer from a OGR PostGIS connection I can get the SpatialReference of the layer, but is it possible to get the EPSG value? Is there any documentation on this? For example: lyr = ...
3
votes
2answers
6k views

Replacing Raster Values in Ras1 with Ras2

I have two rasters Ras1 and Ras2. I want to change the Ras1. In Ras1, there are few areas, lines, points I am interested having nodata cells and wrong data cells.(limited to interested areas only ...
4
votes
1answer
1k views

Free dataset of world cities, including city geometry

I am looking for a free dataset of world cities. I checked all the datasets suggested in the question : Is a Country/State/City Database available?, but couldn't find one where the city location is ...
4
votes
2answers
6k views

How to use Distance Matrix tool in QGIS?

I have a point data set. Now there are cluster of points based on a field. So I take out one such cluster which has points with same field.I want to find distance between all the points in cluster and ...
0
votes
2answers
445 views

Points appear at different location when using google map overlay

I have used vector point from database and also polygon country vectors from database.Points appear with in this country vectors but as I switch to google earth map as base layer the points at smaller ...
11
votes
4answers
4k views

Is it possible to export GeoPDF from QGIS?

Is there any plugin for QGIS which would help me in exporting the map document as a GeoPDF ?
7
votes
2answers
1k views

How to animate raster time series using open-source GIS?

I have a bunch of rasters taken about 10 minutes apart, and I have a nice QGIS project that produces pretty enough maps of them. I'm wondering if there's a way to animate this raster series, with a ...
5
votes
2answers
2k views

Using SearchCursor to access & export values in a raster table

I am desperately trying to export the values in a raster table to a .txt file. I've seen some other folk post about this, but for some reason can't get the code to work in my case. I have a raster, ...
21
votes
3answers
5k views

How can I calculate the average width of a polygon?

I'm interested in examining the average width of a polygon that represents the road surface. I also have the road centerline as a vector (which is sometimes not exactly in the center). In this example ...
9
votes
1answer
3k views

Is the ArcGIS Server JavaScript API free to use?

The 2008 blog post announcing the ArcGIS Server JS API says: Everyone can use the ArcGIS JavaScript API. There is no fee for using the ArcGIS JavaScript API or deploying an application built with ...
0
votes
1answer
313 views

Simple Features and ArcGIS Domains

I am working with a number of detailed ArcGIS Geodatabases with domains used to enforce specific workflows, etc. This is all good and great, but I would like to move my data into either a ...
1
vote
1answer
520 views

Steps to polygonize raster KML image

I suspect I'm trying to do the same thing as in Convert image in KMZ to polygon. Given a kml displaying an image within a given lat/long boundary, what are the steps I follow to use Quantum GIS to ...
1
vote
1answer
133 views

I need help to find out more information about Topology Errors toolbox or Extension?

I need someone out there who can answer my question. I do not remember if I add this Topology Editor Extension or toolbox to my ArcMap. I would like to know more about this toolbox. Thanks. (Changed ...
2
votes
0answers
133 views

How to configure various client applications to display AVL data?

Given x number of GPS units transmitting NMEA formatted strings back to a server (xxx.xxx.xxx.xxx:xxxxx) is there a way to listen in on the traffic and parse NMEA formatted strings for display on a ...
1
vote
1answer
412 views

What datum (reference ellipsoid) does Nasa Worldwind use?

What datum (reference ellipsoid) does Nasa Worldwind use? I can't seem to find where Nasa Worldwind tells explicitly what datum they use. I need some sort of valid link.
7
votes
2answers
5k views

What datum (reference ellipsoid) does Google Earth use?

What datum (reference ellipsoid) does Google Earth[1] use? I can't seem to find where Google Earth tells explicitly what datum they use. I need some sort of valid link. [1] The default free version ...
1
vote
1answer
456 views

Mapping Multiple Variables - MapInfo Professional

I am a fairly new user of MapInfo and was trying to determine if there is a simple way to do the following: I have these first two parts down: Plot a list of retail stores within a given ...

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