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5
votes
4answers
9k views

Arcgis Server vs Open Source software [closed]

What do you think what are the advantages and disadvantages (of both)? Of course appart from fact that open source software is free to use. I mean rather somethink like capabilities, functionality, ...
5
votes
3answers
2k views

Open source database of world locations [duplicate]

Possible Duplicate: Comprehensive list of Latitude and Longitude values of cities round the world i would like to know if is out there any downloadable database of world locations, i know ...
5
votes
6answers
1k views

Open source/free software for generating a 3D view of mapping?

Is there any software that will generate a 3D view given a DTM/height data and raster mapping, and output an image in a printable resolution? I am looking for something similar to what you'd find in a ...
5
votes
3answers
635 views

Looking for a .NET Dijkstra component using Shapefile

I'm totally new to stackexchange and i'm in this beautiful informative place for one problem. I'm a .net programmer and i need to write a program that reads a shapefile and performs routing operation. ...
5
votes
3answers
979 views

In Qgis, Is it possible to edit the datasource of a Postgis layer?

After creating a layer with RT_SQL_Layer plugin, I want to change some details in the query. Is it possible? or I have to aways create a new layer every time I want to change something in the query? ...
5
votes
3answers
445 views

Are there any open source tools for the processing of UAV images?

I have aerial photographs taken by a Unmanned Aerial Vehicle (UAV). I want to do ortho mosaicing and DEM creation to do volumetric analysis. Are there any open source tools that process the UAV ...
5
votes
2answers
4k views

How to create a WMS Service to display a geo-reference image

I currently have little experience in the opensource area and I'm guessing this is where I need to go if I want to create a WMS Service without needing ArcGIS Server. Basically my goal is to take a ...
5
votes
2answers
274 views

How to deal with multitype data sources in QGIS?

Today I was trying to import a DXF to Qgis, the result is that qgis displays everything LINES and POINTS but it only displays options for the POINT objects. When I try to export to a shapefile, it ...
5
votes
3answers
3k views

Free MobileGIS like ArcPAD

I'm looking for open-source program like ArcPAD. I have read all questions and answers, but i find nothing. I need the program for PDA (Dell axim x51v + GPS modul) and I want mapping points (trees or ...
5
votes
2answers
1k views

Quickly create contour polygons from cost points using OSS for web app

This is related to a previous question I've asked: Create filled contour map with GRASS I've created a point layer using OpenStreetMap data and pgRouting's driving_distance() function, where the ...
5
votes
1answer
1k views

Open Source Remote Sensing vs eCognition, ERDAS etc Is it worth it?

What, if any, would be the main benefit of using a commercial tool like eCognition (in particular) or ERDAS as opposed to something like Orfeo Toolbox or OpenCV? (Feel free to suggest other open ...
5
votes
2answers
259 views

3D snapping in open source platforms

I'm looking for tools and extensions in open source platforms (gvSIG, QGIS, uDig, etc) that allows 3D snapping. In the last years, most of the projects my company is working on required the editing ...
5
votes
1answer
474 views

Is there an open source tool to planarize graphs?

I read about the planarize function in ArcGIS, which seem to do exactly what I want. Is there a similar feature in QGIS or another free tool? I have a shapefile with various shapes intersecting each ...
5
votes
1answer
998 views

How to create a polygon from other polygon boundaries?

I want to write an algorithm that creates a polygon inside a hole made by a set of other polygons. It's something like a flood fill and it's like the "boundary" tool in Autocad. The image shows an ...
5
votes
3answers
581 views

gvSIG advantages

Direct comparison between software may not be the best thing to do but as I can't arrive at a conclusion thought of asking here. Is there any gvSIG user in this GIS community? Looking at the ...
5
votes
1answer
159 views

Is there Open Source equivalent to ArcGIS Integrate (for topology correction)?

I need to transform a set of polygons so that it forms an exact spatial partition/tesselation (no gap - no overlap). What are the existing open-source solutions (software or library) to perform this ...
5
votes
2answers
520 views

select by attribute on shapefiles with open-source python modules

I usually use ArcGis 9.3.1, but when running a python script that includes Select_by_attribute (from gp), the script runs very very slowly. Is there a way I can perform a select-by-attribute on a ...
5
votes
1answer
302 views

Parse error while inserting values into polygon feature

I created a polygon as follows create table boundary (id int, name text); table created; select AddGeometryColumn ('',boundary', 'latlon' 4326,'POLYGON', 2); geometry column added; then i'm ...
5
votes
1answer
793 views

How you can repair invalid topology errors within postgis?

I've imported the shapefile of corine land cover project to my postgis database and the select gid, ST_IsValidReason(geom) from gis.clc2000 where not ST_IsValid(geom); returns in every occasion ...
5
votes
1answer
135 views

Looking for open-source solution to show map with massive objects(3x3 polygon) on a web site

I don't have much experiance in GIS systems. I am developing a web site which need to show a map with 3m x 3m rectangles for a radius of about 400 meters.(about 58,000 polygons for one location) I ...
5
votes
1answer
569 views

Memory leak in ArcGIS aggregate points/buffer/Addfield/cursor

I am starting to have concerns about the ability of ArcGIS 10 to fulfill a deliverable of mine. It got me to wondering what exactly else there is, that can perform similar functionality? ET ...
5
votes
3answers
158 views

What are the most efficient Geographic Weighted Regression packages?

What are the most memory efficient open source packages for calculating a geographically weighted regression (GWR)? I am in a situation where I need to do a geographically weighted regression on a ...
5
votes
0answers
132 views

How to add shapefile name as attribute during merge? [duplicate]

Possible Duplicate: How to add field with filename when merging shapefiles with ogr2ogr? I have more 200 shapefiles with a unique name. I would like to merge all of these together and save ...
5
votes
0answers
328 views

Can Quantum GIS replace Proprietary GIS? [closed]

I’m an MSc GIS student in the final year of my studies. I’m researching for my dissertation project which is entitled ‘Can Quantum GIS replace Proprietary GIS in large organisations?’ I’m primarily ...
5
votes
3answers
343 views

DEM generation from ASTER L1B imagery using FOSS

Is there any (photogrammetric or other) FOSS package to support the generation of a DEM from ASTER L1B products (i.e. combining the spectral bands 3N and 3B)? Are there any practical examples or/and ...
4
votes
4answers
2k views

is my open source web GIS software selection ok?

Which are the best open source tools for building a web gis application having PAN, Zoom, Query/search, Label etc options ?. I have decided to use Postgre sql for database and geoserver as middleware. ...
4
votes
2answers
225 views

Which GIS best for this problem?

This problem is similar to retail presence optimization. I'd like to know which GIS's could help us do the following: Given a set of point locations, create a circle of radius n meters around each. ...
4
votes
4answers
401 views

Looking for web and desktop tools with GML support

I am a graduate student and a novice in GIS field. I have few GML files that contain vector polygon data and I want to see them in a map format. The problem is that I do not have access to ...
4
votes
3answers
2k views

How to calculate orientation of line segments using open source GIS?

I'd like to calculate the orientation of line segments relative to north direction using open source tools. Which tools or functions would you recommend?
4
votes
3answers
2k views

3D visualisation with open source GIS software [closed]

I'm searching for QGIS (or other open source GIS software) tools that can analyse XYZ data. Also I'm interested to hear about if anyone have migrated to non commercial software regarding geological ...
4
votes
2answers
501 views

Workflow in ArcGIS 10

Our agency has collabrated with six townships and one city for preparing an inventory of stormwater network. We are using ArcGIS 10 (2 ArcView licenses) and ArcPad 7.1 (stuck with it since our ...
4
votes
1answer
262 views

Is there an online source of raw contour data?

My goal is to get a vector image (SVG preferably) of a local mountain. The data clearly exists, but as an armchair cartographer without access to raw layer data I've been reduced to combing the web ...
4
votes
2answers
384 views

How to efficiently project datasets of varying coordinate systems into one coordinate system?

I am working on streamlining data processing at my organization. Currently we are using various large-scale Models that we will gradually bring into Python. The gist of our data processing is as ...
4
votes
2answers
110 views

pgAdmin vs psql

I have downloaded postgreSQl 9.3 and Postgis 2.1 recently as an educational adventure and have been working with both through the pgAdminIII interface. I haven't used psql yet when working with my ...
4
votes
3answers
519 views

Where can I find a GDAL distribution with DWG support?

I want to use the GDAL utility ogrinfo with dwg files. Where can I find an GDAL distribution with a support for DWG files (read only)? DWG support is moved out of the normal GDAL/OGR source ...
4
votes
1answer
2k views

Best way to visualize Google Maps and Mapinfo (or SHP or SQLite) at the same time?

I am having a bunch of Mapinfo data of a large area. This data has multiple layers and is also available as SHP, and of course it could be easily converted to SQLite ("SpatiaLite"). Although probably ...
4
votes
1answer
1k views

OpenLayers Style Question … not working in IE

I'm trying to use OpenLayers to produce a map I'm using the following to style a layer in the map. It seems to work fine in Firefox but I get javascript error in IE 'symbolizer' is null or not an ...
4
votes
6answers
1k views

flex/AIR based SLD generator?

Styling layers in GeoServer can be tedious to say the least. While Styler can relieve some of that tedium, it doesn't yet work in chrome. It can wreck existing styles if not carefully used and still ...
4
votes
1answer
227 views

Splitting a shapefile into many shapefiles with open source

I want to create a shapefile for each of the 72,000 census tracts in the United States that includes the census blocks in that tract using open source software. I will probably start with a state ...
4
votes
3answers
210 views

How to print from arcpad without buying more ESRi sofware?

I am running ArcPad 10 in windows 7 on a laptop and on a field unit consisting of an Ashtech MobileMapper 10 as a PDA talking to an SXBlue GPS. This system provides the real time half meter (without ...
4
votes
3answers
929 views

How to link a video to a GPS trail?

Does anyone of a program, extension or tool that links a video with a GPS trail? I found this video and would like to be able to do something similar. http://www.youtube.com/watch?v=G07DWVRJBVU ...
4
votes
2answers
866 views

How to cut a shape file?

I want to use a shape file of the Corine Land Cover. This covers all of Europe, but I am only interested in the area of Scandinavia. How can I cut this file using free software (preferably a ...
4
votes
2answers
540 views

Which are the best open source tools/solutions for digitizing road networks?

I was thinking on tools/plugins for QGIS, but other good suggestions are welcome.
4
votes
1answer
3k views

Converting tax map polygons from Shapefile to table of map number and corner coordinates

Fairfax County, Virginia provides a Shapefile here which shows the boundaries of the tax maps as polygons. Each polygon simply consists of four corners, and what I'd like to do is create a table ...
4
votes
2answers
686 views

how to convert UTM northing and longitude to latitude

I am doing some work with the Military Grid Reference System (MGRS), which is based on Universal Transverse Mercator (UTM). I find that I need to convert from UTM northing and longitude (actually, ...
4
votes
1answer
429 views

How to display intersecting roads and create multiple labels for long roads in QGIS?

I am new to GIS and I am using Qgis 1.7.3 on Windows. Can any one please tell me how to display a map from line shapefile with these two characteristics: Roads are displayed with borders at the ...
4
votes
2answers
2k views

GPS Module Without Velocity or Altitude Limitations

I am looking for a GPS module that I can use in a high-altitude project. The problem I have discovered is that GPS manufacturers are required to place a set of restrictions on GPS modules. The ...
4
votes
1answer
67 views

looking to integrate R-trees into AlchemyDB

I am the author of AlchemyDB: http://code.google.com/p/alchemydatabase/ I would very much like to add geospatial indexing in the form of R-trees (most likely) and need some advice on whether or not ...
4
votes
2answers
483 views

Retrieving average building height in urban areas?

I am looking for a way to collect data on the height profile of some cities over time. I don't need to produce a detailed 3D reconstruction of cities, nor do I need to detect and measure individual ...
4
votes
1answer
128 views

Create Basemap with custom Data

I am getting trouble with creating a basemap with my own data. I have huge data. So I don't want to use any other basemap platform like leaflet or Mapbox or Google. I have tried with ArcGIS server ...