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التنمية المستدامة : المفهوم,الاهداف,الاساليب تعرف التنمية المستدامة كالاتي "هي التنمية التي تلبي حاجات الحاضر دون التفريط في تأمين حاجات أجيال المستقبل " . وقد تبنته الأمم المتحدة وأوصت المنظمات الحكومية وغير الحكومية وجميع الهيئات المهتمة بالتنمية باستخدام مفهوم التنمية المستدامة في...

I"m working with arcpy, where I'd like to write a script that examines the selection and if only 1 element is selected creates a buffer. I want to get the symbology from another layer, as the buffer needs to be hollow, becouse at the further part of the script I export the layout for printing...

i am trying to iterate over a large list of features and making a screenshot of the selected feature. My problem is that it seems to be a delay between the refreshing of the canvas and the taking of the screenshot. In other words, the screenshot taken does not correspond to feature i but to...

I'm trying to obtain a raster of Euclidean Distances from a vector layer I have of a river in Spain. I did it very easily with ArcMap using Euclidean Distance, but I don't know how to do it in QGIS. I just want to obtain a raster with all the distances from the river so I can then reclassify...

I have a point layer which I want to spatially join to a polygon layer (bring in the attributes). This works fine unless there are overlapping polygons, if so the QGIS spatial join tool will only bring back the features from the first one found (or some average). An average is not suitable...

Can I ask how can I compile pg-routing myself so i can modify the codes myself? I now installed by sudo apt-get install. When I downloaded the source codes from github and compiled it myself, it passed. But when I tried a function in postgis, which did work using the version installed from sudo...

Please see link : http://www.qgistutorials.com/en/docs/building_a_python_plugin.html I am using the same process for uploading a CSV file in a folder but it gives me an error. I am using this code: def select_output_file(self): filename = QFileDialog.getSaveFileName(self.dlg...

I'm trying to form a mosaic from two overlapping images of an old tithe map. I've used the georeferencer plugin using one of the images as canvas to generate a modified version of the other. I then used Raster>Miscellaneous>Merge. This generates the following commandline: gdal_merge.py...

How to get the most of these two popular Open-Source GIS software Why you should care to learn QGIS and PostGIS How can a DBMS protect your data What is the potential of PostGIS How to combine PostGIS and QGIS into a powerful platform أكثر...

2015-07-21 15:34:55 | Geometius presenteert de eXom, de eerste multicopter van de fabrikant senseFly. أكثر...

Hola a todos, Como sabréis est أكثر...

Bonjour à tous, Actuellement en stage et travaillant sur ESRI grâce à une licence délivrée par l'université. Je souhaite transposer la méthodologie - que j'ai construite - sur d'autres logiciels SIG, tels que QGIS ou MapInfo et cela sous la forme de tutoriels. L'intérêt étant de laisser à...

Using pyqgis, i am trying to export some maps as images using QgsMapRenderer. Here is the layer/style setup, both load correctly: lyr = QgsVectorLayer(uri.uri(), 'Report', 'postgres')styleload = lyr.loadNamedStyle(stylepath)if not styleload[1]: print 'Error loading report selected style'if...

The USGS just announced the 3DEP program via a Broad Agency Announcement for FY 2015/16. The BAA provides detailed information on how to partner with the USGS and other Federal agencies to acquire... Click Title to Continue Reading... أكثر...

I want to do raster calculations in QGIS based on the latitude and longitude of each pixel. The calculations will compute the area of the pixel, but also do other calculations for various projections of land masses. The QGIS raster calculation facility does not appear to support variables for...

I have the following code coastline

Is it possible to download 1:2000 scale of a town using google earth image? If divide the whole area into grid and mosaic them is an option, how it is done using google earth? I tried using grid. But there is no option to change the grid size. أكثر...

Image Analysis, Classification and Change Detection in Remote Sensing With Algorithms for ENVIIDL and Python Book Description Publication Date: June 6, 2014 Image Analysis, Classification and Change Detection in Remote Sensing: With Algorithms for ENVI/IDL and Python, Third Edition...

Plant Image Analysis - Fundamentals and Applications Book Description Publication Date: September 17, 2014 The application of imaging techniques in plant and agricultural sciences had previously been confined to images obtained through remote sensing techniques. Technological advancements...

I have some contours where the z value is stored in the geometry and I want to display it as an attribute. I want to include this in a python script. I have an expression which does this in python field calculator: !Shape!.firstpoint.zThis works perfectly, but when I include it in my script...