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4
votes
2answers
93 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 ...
6
votes
2answers
796 views

FOSS method to split raster into smaller chunks

I have a raster (USGS DEM actually) and I need to split it up into smaller chunks like the image below shows. That was accomplished in ArcGIS 10.0 using the Split Raster tool. I would like a FOSS ...
0
votes
2answers
97 views

FAHP/AHP for GIS in free software?

Anyone knows a free GIS software that implements the Analytic Hierarchical Process (or its fuzzy extended version) ? And while asking, have anyone had any experience with a commercial GIS that ...
6
votes
3answers
1k views

Is it possible to create 3D dxf with OGR?

Does anyone know if it's possible to create a 3D dxf with OGR. I would like to assign our contour lines a z value and export them to dxf for some cad work. PS I know FME can do this, however I would ...
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 ...
3
votes
4answers
3k views

How to calculate for every basin/sub-basin, drainage area at every elevation contour along stream?

With DEM as source, I created all necessary files like flow direction, accumulation,slope,streams,watersheds,pour point etc.... In my watershed(basin), I have many sub-watersheds(sub-basin) with ...
2
votes
2answers
520 views

Issue Trying to create Zonal Statistics using Gdal and Python.

I am trying to create zonal statistics using Python and Gdal. I have a polygon shapefile and a raster file, and in order to do so, I am using a piece of code I found in StackExchange. The raster and ...
1
vote
2answers
45 views

How can I determine which polygons contain other polygons?

I am using only free, open source tools. I have two shape files: a shape file of voting precincts and a shape file of census tracts. I want to know: which voting precincts fit inside which census ...
24
votes
8answers
11k views

Open Source Tool capable of reading Esri File Geodatabase (.gdb)?

I have an ESRI File Geodatabase (.gdb) file that I would like to convert to shapefile (or any other non-proprietary format). Are there any Open Source tools to do so?
2
votes
2answers
229 views

LANDSAT Image classification and open source solution(s)

I have some experience with ERDAS IMAGINE in doing some supervised/unsupervised LANDSAT imagery classifications and now find myself in the position of needing to do the same but without the access to ...
128
votes
56answers
10k views

What free programs should every GIS user have installed?

Note: This question is specifically about installed, desktop software. There is another question specifically about free cloud-based software and services. I'm not necessarily referring to ESRI ...
6
votes
2answers
595 views

Which Open Source GIS application support Linear Referencing and Dynamic Segmentation?

I'm looking for an Open Source GIS application that supports Linear Referencing and Dynamic Segmentation for the development of a road inventory system. I already know about GRASS but I'd like to know ...
1
vote
0answers
57 views

How can I edit spatial data automatically on postgis and check for topology errors on said data whitout using shapefiles?

So, I have spatial data stored in postgis (points, lines and polygons) and would like to edit and update those in an Open Source software (quantum GIS, grass, etc.) to check for topologic errors, ...
6
votes
7answers
1k views

Open source tool to convert a DEM to a 3D model

I would like to convert a DEM (Digitial Elevation Model) file (e.g. from SRTM) into a 3D model that I can then edit with regular 3D modeling tools (e.g. Meshlab/Blender/etc.). However I'm using Ubuntu ...
2
votes
3answers
956 views

Viewshed / Line of Sight analysis- as a batch process?

I wish to carry out a line of site analysis similar to the subject in here (preferably within QGIS): Visual Impact Assessment in QGIS or GRASS Scenario: I have two points, A and B. Point A is a ...
9
votes
4answers
306 views

What free or open source cloud-based software is recommended by/for the GIS community?

Note: This question is intended to complement an earlier question on installed, desktop software. What GIS-related, or even non-GIS-specific, web- or cloud-based software/tools/services -- that are ...
1
vote
2answers
104 views

How to get an indication of how points are spatially distributed?

Let's say I have a set of points and I want to get an indication of their spatial distribution. That is, if all points are at one location a possible return value would be 0, whereas if all points are ...
4
votes
2answers
478 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, ...
0
votes
0answers
52 views

Best OpenSource Database to serve images on web?

I am using a mysql database where I store images as blobs. From here, I serve them on the web. Does anyone know if there is another opensource option that works better? I would need something to ...
4
votes
3answers
284 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 ...
2
votes
2answers
110 views

How can I share my own spatial data on an online map?

Note: I am very new in this field! Can I find an open source map that enables me to display an overlay of my own layers? I need to add some text and rectangles for a certain area, but my ...
1
vote
1answer
75 views

Is it a good idea to use GRASS Algorithms for Geoprocessing in a Server Environment?

I´m designing a web-service to run in a server environment that will do some geoprocessing actions to datasets uploaded by users and send the results back. I´m programming in Python, and so far I´ve ...
0
votes
0answers
69 views

Exporting basemap & Layers as an image?

I need a open-source server-side component for a web-application that can export basemaps + layers to an image format (saved on a db). Being slightly new to GIS, I've managed to find a few tools that ...
7
votes
5answers
3k views

Large mosaic process failing - what are the options? software independent only focussed on result

I need to mosaic about 550Gb of tif imagery together and the software I have tried keeps failing. The area has been split into zones so that the smallest has approx 200 tiles. I have used the latest ...
1
vote
2answers
113 views

Where to find Icon library for custom GIS software?

I am building a desktop application and currently utilizing a mix of icons for pan, select, zoom, attribute table, etc that have been randomly taken from the internet and modified. The overall look ...
36
votes
6answers
7k views

Free GIS workshops, tutorials, and applied learning material

Note 1: Please enter answers separately or feel free to edit this post directly Note 2: Please report on any broken links so they can be removed This thread lists free as in $0 workshops in GIS and ...
10
votes
8answers
9k views

Is there a comprehensive list of latitude and longitude values for cities around the world?

I'm developing an application that calculates the distance between cities using their respective Longitude and Latitude values. But the problem is where to get a comprehensive list of latitude and ...
2
votes
1answer
146 views

Open Source True Ortho Software

My work does true ortho rectification. We are looking to transition into a more open source company. One of the processes we are looking to "open source" is true ortho. Does anyone know of a ...
12
votes
4answers
4k views

free GIS software that can orthorectify?

Would someone care to recommend a free and/or open source GIS application that can orthorectify map images?
6
votes
3answers
3k views

Where do I find the ogr2ogr command for Mac OS X Lion?

I am looking for the equivalent of FWTools for Mac OS X, Lion. Is there anything I can easily install and get that command?
0
votes
1answer
189 views

How to run Layer Stack in Batch Mode with GDAL?

My goal is process fifteen Landsat-8 scenes with three bands. I need to rescale the pixel depth from 16 bit to 8 bit, stack three bands and mosaic all them. This job must be making via open source ...
0
votes
1answer
73 views

Creating a postgis database a GML application schema

Is there any open Source tool(automated or semi-automated) that converts GML application schema to a POSTGIS database/table .Specifically I have a huge application schema containing many ...
0
votes
1answer
118 views

Can I use google api or google maps in web application developed with arcgis api or esri technology?

I need to know that is it possible to use google map (as a basemap) and its GIS functionalities(like find/search features) in my web application developed with arcgis api for ...
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 ...
8
votes
2answers
2k views

Looking for open source software similiar to ESRI City Engine

I am looking for open source software similar to ESRI City Engine and currently going through open source software directory. Update : About ESRI City Engine (Quick introduction) We want to make ...
4
votes
3answers
1k 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 ...
1
vote
1answer
78 views

What tools or opensource library could I use to deal with LIDAR data(mobile laser scan data)? [duplicate]

I would like to do some reasearch job relating to automatic objects extraction along the road, like road markings, pole-like objects. I have to pre-process the original data before applying my own ...
0
votes
0answers
24 views

Selecting features through a many-to-one relationship

I want to select multiple counties based on the occurrence of a species present within them. I have a County polygon layer with CountyName as an attribute, a flat table called tblSpCnty with the ...
12
votes
6answers
2k views

Looking for free program, similar to 3D Analyst, to visualize tree stands in 3D

Heyho, I want to make a 3D stand visualization of trees in a specific area. I need something similar in functionality to ArcGIS 3D Analyst, but I don't have a license for that plugin anymore. The ...
4
votes
6answers
963 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 ...
2
votes
2answers
228 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 ...
14
votes
6answers
4k views

A SQL console in QGIS

I know QGIS comes with its field calculator, which is not bad. It also comes with ftools which permits several operations on geometry and attributes. But we often need more control and I haven't seen ...
2
votes
1answer
239 views

Getting SAGA-GIS Python Bindings without compiling from source

I am very new to SAGA-GIS, but I recently developed a workflow using SAGA for processing LiDAR data. Now I need to batch the process using Python. I installed SAGA from the Windows installer and I ...
2
votes
1answer
86 views

Open Source + Offline Geo Notebook

I am looking for an open source offline software to record points of interest that I might visit at a later date. Let's say I am reading a book about Alaska, I'd like to take notes about interesting ...
0
votes
0answers
91 views

Calculating distances between boundaries of polygons with Python

I have two sets of shape-files which have to be worked on within a Python Script. Those two Shape Files might differ from each other (same thematic content, but 2 different epochs). If there occurred ...
23
votes
6answers
680 views

What are some good introductory books or articles about Open Source GIS for students coming from an ESRI background?

I am preparing an intermediate GIS course for graduate and undergraduate students who have likely not been in touch with anything but ESRI software. It is an existing course in the curriculum that I ...
0
votes
2answers
687 views

A script on this page may be busy, or it may have stopped responding

I'm using OpenLayers - 2.11,GeoServer 2.13, ExtJS 3.4, and Java for developing GIS based web applications. Recently i'm getting below error message in my application "A script on this page may be ...
2
votes
1answer
253 views

Are there Open Source alternatives to ArcGIS Aggregate and Extract Value to Points?

I am looking for some kind of Open source GIS library which can perform spatial analytic functions same as ArcGIS. My use case is : I am processing GeoTIFF file provided by USGS and performing ...
11
votes
4answers
2k views

Is there a Python Lib for requesting WMS/WFS and saving as image/PDF?

i am wondering whether there's Python open-source GIS lib which has APIs to support call WMS/WFS from another GIS server (e.g., GeoServer) and then save the response data(WMS Basemap and WFS layer) as ...
1
vote
1answer
61 views

Infrastructure networks in GIS modelling

I am currently working on a GIS-based project which aims to model the interdependency of existing infrastructure networks, e.g. transport, oil, pipeline networks, etc. The network interdependency ...