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I am a bit of a novice with GIS and am currently in the process of using the programme for completing my dissertation project at university. I have created several 500m buffer zones around streets in GIS. I ultimately want a combined buffer so only the outside line that measures 500m away from...

I am having trouble publishing a map file using ArcGIS publisher. This mxd is intended for use by ArcReader but I keep getting a "file access error message asking me to check that the file permissions are correct and that it is not already open by another application".I have been granted...

i have an application written in QT 4.6, and use the C++ API of QGISthe application will display the data of the s57 file in a MapCanvasi managed to read the file but how can i , for a specific layer , change the fillcolor, the color or the shape of the symbol, there is no function in the class...

How do i find the date of acquisition of the Google map on QGIS? Please help. أكثر...

I have a local install of CartoDB in my Ubuntu 14.04. I have created a CartoDB account called "development" and been playing with it for a while. Now I'd like to import some data from a shapefile directly using ogr2ogr. I've installed GDAL 2.0 since this post mentioned ogr2ogr wouldn't create...

I have a postGIS database populated with OSM data with the osm2po import tool. I have a number of fixed points that I want to route between using pgrouting. In order to do this accurately, I want to create new nodes (vertices) at nearest points on nearest edges to the actual coordinates to be...

A new Image Control allows for easy embedding of pictures, logos and images of all types on to your Layout windows. أكثر...

Esri data reveals that more people are renting instead of buying homes. أكثر...

Esri maps feature case studies, each identifying one of the many causes of income inequality and how it manifests itself in the selected city. أكثر...

By clicking on the different demographics, you can see a summary of the type of person Esri's geographic data says you are. أكثر...

Esri UC brings together policy makers, number crunchers, ecologists, cybergeeks and cartographers for five days of mapping the future. أكثر...

Anthony Calamito is a Solutions Architect for Boundless, and is concurrently filling the role of Federal Chief Technology Officer (CTO). Anthony has over 12 years of experience supporting the implementation and advancement of GIS for many organizations in both the Defense and Intelligence...

Bonjour, [QGIS 2.8.1] Lorsque je vérifie la topologie (Points doit être couvert par un segment) Qgis me retourne comme erreur tous les points qui ne sont pas sur une extrémité d'une polyligne. Or je n'ai pas mis "doit être couvert par les points terminaux". Lorsque je fait "doit être... أكثر...

Bonjour, Je travaille sur la version 2.8 de QGIS (Wien). Je cherche à donner la même couleur à mon objet et à mon étiquette, mais de façon automatique. En clair, j'ai un grand nombre d'objets, que je vais classer par catégorie. A chacune des catégories, à l'aide de la palette de couleur, je...

The model iterates through a Point Feature Class to calculate different volumes. As an output I get two different styles of tables, both in one and the same iteration. One is the actual correct output table, the other consists of one column only, having all the values written one after the other...

I have a TopoJSON file which describes electoral districts in Montreal, and I would like to produce an adjacency matrix which would tell me which districts share a boundary with which other districts. Is there an easy way to do this? Edit: here is the file...

So I'm working on a project that's been in development for over a year, but I only recently got involved. My task involves converting roughly 2,500 KML files into another format, importing these files into a Geoserver, and then copying over the associated style information for each file. I...

I have a polygon shape file,I want replace every irregular polygon with circle. I think I can do it with The Replace Geometry tool.But once The Replace Geometry tool is selected, draw a polygon mode immediately enter, if select the circle tool in the Draw tool window, The Replace Geometry tool...

I'm new to this, so please go lightly if I'm asking something obvious. I imported an Excel file with 9,159 entries and I'm mystified as to why 841 are cartodb_georef_status false and another 36 null. So, something like a tenth of the data isn't getting mapped. Many are international addresses...

In the ArcMap, you can use the copy and paste on the standard toolbar or use the Copy Features tool on the Advanced Editing toolbar to copy the selected feature,but the former can only copy feature to the same location specified feature, while the latter can be copied to the feature specify the...