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While there are many new data sources and analysis techniques available today, GIS is not new to most communities. GIS capabilities have been used within government departments for decades in order to make the delivery of community services more efficient and effective. Governments have shown...

Introductory slides to Python and ArcGIS أكثر...

StreetMap Premium for ArcGIS North America TomTom 2015 Release 1 and StreetMap Premium for ArcGIS Europe TomTom Release 1 are now available. These datasets provide routing, geocoding, and high-quality cartographic display for countries in North America or Europe using ArcGIS for Desktop or...

If you attended the 2015 User Conference you probably saw a demonstration of this prototype of the upcoming Story Map Cascade app*during the plenary or one of the Story Maps workshops.*There are several screenshots below, but to truly get a feel for what this app will be like click the image...

Why does the top of a mountain appear bright on a SAR (radar) image.I know that the peak of a mountain is subject to a layover effect, thus appearing closer on the radar image than the bottom part of the mountain. And, that the back part of a mountain is dark (shadow) because it is not reached...

I have a couple map files and I am trying to start a new project. What is the correct way of going about this? Should I first make a gdb, then add the maps to that gdb and then add feature classes to the gdb, etc? Also, once I have created my first gdb, if I want to create a second and transfer...

I have a two shapefiles, one is a DMA level and one of US states level. How do I figure create a shape file containing DMA of a certain state, for instance, Texas from a larger shapefile. I tried running this query, but with no success SELECT geom FROM usdma WHERE ST_Overlaps(usdma.geom...

I am very new to programming (I started learning this semester) and would very much appreciate helop with one piece of a project. I have the following table, and I need to write a script compatible with Arc10 that will extract some statistics from it. Specifically, I need to obtain a total of...

برنامج بروغ كاد وهو عبارة عن برنامج CAD وهو بديل للبرنامج العملاق وذو السعر الخيالي AutoCAD وهو يقوم بقراءة وكتابة الملفات على النوع DWG و التعامل مع القوائم والخطوط والتعامل مع البلوكات و LISP و VBA وبه كل الإمكانيات الموجودة في برنامج AUTOCAD وهو أرخص بكثير وبالتالي مثالي للتعامل معه. اضيف له...

Bonjour :D, je suis sur QGis 2.4, et j'ai une couche de parcelles (6000 entités) où il y a les surfaces, et une couche polylignes qui représente la limite de mon territoire. Mon but est d'obtenir une couche où je peux trouver les parcelles qui se trouvent strictement à l'intérieur du territoire...

سلام. م أكثر...

Given lidar/point cloud data, is there a way I can access individual points within it programmatically? أكثر...

I'm trying to write a custom geoprocessing function tool in ArcObjects that I can then expose as a service on ArcServer. The output parameter will be a zip file that contains a filegeodatabase. I have marked the parameter as a required and attempted to set some of the default properties of the...

I'm trying to move out of ArcGIS into QGIS permanently for basic operations, so be patient please. Here is the problem. I'm trying to georeference a topo map in EPSG:22523 (Corrego Alegre UTM). I did the regular procedure, which has worked before for WGS84 stuff, and is also shown in QGIS...

Finally my code works but the renderering display just one color instead of 4 I don't know why, I follow the sample code of the snorf.net website and the sample code in the qgis python programming cookbook but for a specific vectorlayer i had to display 4 differents blues, but I have only one...

I try to get the categorizedSymbolRenderer value in order to render them In all sample of code I found ( in python but not in c++ ) it said : renderer = QgsCategorizedSymbolRendererV2(expression , categories) layer.setRendererV2(renderer) In my application I want to do the same thing but in...

I have points representing sample locations. Often, multiple samples will be taken in the same location: multiple points with the same location but different sample IDs and other attributes. I'd like to label all points which are co-located with a single label, with stacked text listing all the...

(Note: This post concludes the recent GeoCurrents series on regional differences in Chile) One of the most interesting tables found in the Wikipedia article on “Ranked Lists of Chilean Regions” is that of the indigenous population. According to the 2013 Casen Survey, nearly 10 percent of...

I’ve been learning d3 and it’s been a fantastic learning experience. It’s a low-level javascript library for making interactive visualizations–including maps–inside SVGs for nifty client-side rendering effects of datasets that can be updated easily with new data. Incidentally, Scott Murray’s...

I am looking for Ecuador census data (digital GIS if possible) at the sub-parroquia (parish) level. The geographies and the tabular data would be great but at this point I am mostly in need of the digital boundaries. I am looking for the full demographic suite of data with attributes if...