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In light of some recent questions, I would like to take to a moment to discuss what the GeoGig team is up to and what additional steps are being taken to prepare for GeoGig 1.0. To frame this discussion I will highlight two steps (rebase and tag) that are used to prepare a data product for...

I'd like to use the field calculator in QGIS to create a unique feature (polygon) id that reflects different levels in a geographic hierarchy. So say I have a REGION attribute within which there are several AREAS (unique features). I have alphanumeric codes for the REGIONS, but within each I...

Abstract: The aim of this paper is to take stock of the availability, integration and use of cartographic Open Data within the research project of the Department of Architecture, Design and Urbanism (DADU) of the University of Sassari named “Creation and activation of the Sardinian node of the...

Bonjour, je voudrez savoir quelles sont les compétences requises pour créé un site interactif de cartographie collaboratif comme "Wikimapia.com" par exemple merci de précisé les langages informatiques nécessaires et quel est le logicielle de SIG qu'il faut utiliser. cordialement. أكثر...

Bonjour à tous ! Lors d'un export en PDF d'un Atlas (format A3), le PDF qui en ressort comporte la bonne quantité de pages, mais il n'y a rien dessus ! c'est tou vierge ! Je ne comprend pas d أكثر...

PLOS One, Published 02 September 2015 By Grant Richard Woodrow Humphries “Advances in GPS tracking technologies have allowed for rapid assessment of important oceanographic regions for seabirds. This allows us to understand seabird distributions, and the characteristics which determine the...

I have a raster image (JPG) of a fictional map from a fantasy book. I want to add a point-shape file in order to show main events from the book upon the map. My map has no spatial information (as it is fictional) and therefore I am unable to "start editing" the image, which prevents me...

I have been trying to create a torque animation where the points on the map fade out at different times. I have a table with 'start_date', 'end_date', and a 'day_count' which is a count of the number of days between the start and end date. Is there a method of setting up the Torque...

Is there a way to extract a line from a linear buffer? Basically, I have tube-shaped polygons that look like they are the result of a linear buffer. Is there a way to re-produce the source line from the buffers? Or is there a way to produce lines that bisect polygons? أكثر...

I'm trying to use arcpy to create a grid over each of a large number of metropolitan areas across the US. I'm iterating over each metro and trying to create a grid over each one using the "fishnet" tool. Each grid should entirely cover the MSA and all cells should measure roughly 2.5km on a...

The new NGA's newly launched Arctic site uses Esri's ArcGIS platform. أكثر...

The NGA has made its unclassified geospatial intelligence on the Arctic available to the public via a new website using Esri's ArcGIS platform. أكثر...

I'm working on an application with a large number of layers. The goal is for a user to have an arbitrary combination of layers being displayed, with custom layering. One of the requested features is that a user should be able to extract this data into a .shp file or other format. The...

I have a TIFF created from a pdf using GIMP2. The co-ordinate pairs for the extents are shown in the TIFF. I need to convert this TIFF to a GeoTiff and ultimately to a shpfile. The CRS is known. أكثر...

I have a multipolygon of geography type (multi_bounds) and a point. I'm trying to figure out the fastest way to query whether the multipolygon contains the point. In this case if the point is part of the boundary it should still return true. I've tried CoveredBy: WHERE...

I am working in c++/qt4.8.5 with qgis api 2.8.2 For my application I had to load a raster in a mapcanvas, then with different action I had to add pint , line or polygon Is there a simply way to do that, i have idée on how to start, for the moment i can load a raster, but now I had to add...

Summary: U.S. Geological Survey hydrologic technicians are currently taking measurements from hundreds of streams and rivers across the western United States as part of a low flow study Contact Information: Chris Konrad ( Phone: 253-552-1634 ); Ryan...

أتذكر ما يسمى بالرئيس الفلسطيني محمود عباس وهو يهرع إلى فرنسا للمشاركة فى مظاهرة ضد الارهاب الاسلامي بينما لم نسمع له حسا ولا خبرا بعد احتراق أسرة... أكثر...

I recently installed regular Python on my workstation in addition to ArcGIS 10.2. Based on various things I found online, it seemed like the consensus was to install the full Python, because there are some libraries that ArcGIS's version of Python can't access. I am a Python noob so am trying to...

I'm following these instructions from the FCC: https://transition.fcc.gov/form477/Geo/finding_census_blocks_in_qgis.pdf Everything works just fine up until step #6, where the Intersect tool is used. I do everything just like the instructions, but when the Intersect tool finishes, it's just...