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I use a mac, but am thinking of converting over to linux and I have friends with PC's who would like to view- so cross platform compatibility is important. I am NOT any sort of power user of GIS- I literally have no clue and I have been spending hours trying to figure out how to get QGIS...

GIS4930 Special Topics in GIS, Instructor, Mrs. Amber Bloechle and Ms. Deidra Krolikowski Module 2 - Web Applications in Mountaintop Removal Lab Description: Over the course of four weeks, students created hydrology datasets from DEMs, used unsupervised classification to determine areas of...

Bonjour, J'ai une question très bête, venant de migrer de MapInfo à QGis et ne trouvant pas comment faire la manip. J'ai une table Excel avec un certain nombre d'enregistrement, sans colonne X, Y remplie. Je souhaite pour chaque enregistrement positionner sur carte l'endroit correspondant à...

Hello, I'm trying to create DEM from PRISM image, I try to use ENVI but I do not know how it works. as far I know, DEM can be extracted from PRISM by min two pairs of image (nadir & backward, nadir & forward, etc.). How do we know type of PRISM whether its nadir image or backward image? is...

I am using QGIS (version 2.10.1-Pisa) on a Mac (Yosemite). I am trying to export a map in the print composer as jpg or pdf and whenever I do try, the page in the print composer goes blank. when trying to save as jpg, a file is saved but the image is black. it also saves a pdf but the file is...

I am constructing a geological map which involves constructing boundaries to areas which vary in style across their length depending on how well defined they. To do this I have created two distinct layers called "certain" and "inferred", one solid the other dashed. I wish to automatically create...

I've got various polyline shapefiles loaded in ArcGIS, each using the default line style with different colors. For a python addin I'm working on I would like to use arcpy to read the RGB value of these colors. Would that be possible? I noticed this question: Read layer symbology class color...

By Matthew Garamella Yesterday morning was a typical morning — I woke up and rolled myself out of bed to get ready for the day. However, this time I noticed a small patch of paint chipping from the ceiling of my room. Normally I would think nothing of this minor inconvenience, but that...

ArcGIS 10.0 I'm very new to ArcGIS, and GIS is general. I am trying to build a script that will extract metadata from orthoimagery .tifs. Below is my test code to see if I can get the metadata from one file. It is basically the code from ESRI's docs on arcpy and the metadata toolbox...

I am using ArcGIS 10.2 Basic. Is there a way of connecting 1 point (A end point) to many other points (B end points) but following an existing line/route. The B end points all have a field that links them back to an A end point. All the points are snapped to an existing line at various...

I know this should be such a simple task and I looked around but could not find a satisfactory / dead simple answer. I am creating a point layer and needs to draw a row of points. How would I go about making sure that these points are aligned? Something like hold shift key and it'll align it...

I have a lot of arcview .apr file. I need to open & edit in ArcMap 9.3, but the original project file is saved in .apr. I tried to use "import from arcview project". The project file can be open finally, but some data source was broken. I cannot trace the original data file, as the layer name...

Anybody knows the order of magnitude of the error introduced when transforming coordinates using GDAL? More specifically, I would like to know if significant error is introduced when the transformation involves a change in Datum like, say, from NAD83 to WGS84. أكثر...

I tried to use pexif to update my photo EXIF with following the work on StackExchange (How to save geodatabase attachments to disk with updated exif data). However, I got the below error message when I used pexif.JpegFile.fromFile for it. Would you please tell me how to resolve it? > img =...

I'm looking for an open data source which features the amount of cars per road per day or per year for Europe(!). I've found several national reports, which are only available as PDF and as such a not really processable. The ones by EuroStat are not really feasible. I would like to process this...

I tried to test CSWClientDemo of geotoolkit but couldn't succeed. Here is a casting problem: GetRecordsResponseType response = ((JAXBElement) um.unmarshal(is)).getValue();The error I got is: Exception in thread "main" java.lang.ClassCastException...

I would like to get a symbology using several columns. I have read that it was not possible to set up several fields within the CLASSITEM option in the mapfile. I have tried to do this in a different way but the layer is not displaying at all... I'm using Mapserver 6.2.1. Here is a simplified...

I'm displaying coordinates in EPSG:900913 using ol.control.MousePosition() with OSM.I'd like to convert these on the fly in another EPSG:2154. I call in the header : Then my html : Proj4js.defs["EPSG:2154"] = "+proj=lcc +lat_1=49 +lat_2=44 +lat_0=46.5 +lon_0=3 +x_0=700000 +y_0=6600000...

I'm trying to turn a QGIS 2.4 project into a TMS tileset. What method have folks used, with what success and what level of effort? The project in question has about 50 layers and uses OTF projection since different layers are in different CRSs. the QTiles plugin hangs (and takes down the...

I have made isochrone lines using GRASS and QGIS, as shown. The lines show various distances to fire stations on a street network. Now I would like to turn these lines into polygons that look like isolines using QGIS. The lines to polygon tool does not work as expected. Is there a way...