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I am looking for a process in ArcGIS that takes a point feature class and groups the points into a user-provided number of clusters. أكثر...

We recently came across this interesting article about how researchers have created a land cover map of East Africa differentiating the areas with human land cover vs areas that remain natural. The map will be useful for studying many different species of wildlife in the area but it has already...

I have a point shapefile in QGIS 2.10 and I want to display one of its fields attributes based on its unique values (I always know that it has 4 unique values and their values so I do not care for the moment to extract them) I just want points to be displayed with different symbols depending on...

After the successful reception of the “gvSIG applied to town planning” workshop in the gvSIG LAC Conference and gvSIG Per أكثر...

How to apply different color to the fields in the label through SQL query or by some other way . For Ex: I have selected this label query :coalesce("Err_2013", ' ') || '\n' || coalesce("WP_2013", ' ') || '\n' || coalesce("District_C", ' ') Here I want to display first field i.e "Err_2013" with...

i am trying to create wms service using postgres data in mapservermy map file(wms.map) is MAP EXTENT 8240841.450745 2400319.900386 9218007.463612 3107183.406947 TRANSPARENT on IMAGETYPE png size 150 500 web metadata"wms_title" "Customer Airports" "wms_onlineresource"...

My algorithm needs a temporary layer in a QGIS processing script. I can use regular pyqgis api to create a temporary layer but want to know if there is a preferred and processing-specific way of doing it. Since processing already creates a temporary directory for the output, can it be used for...

The point clustering with numbers in CartoDB seems to be buggy: Numbers

En el tercer post sobre el nuevo complemento de segmentaci أكثر...

I have a polygon layer where I am unable to calculate the areas for some reason, and it gives me the result 0.00 for all of the polygons. I have another layer on the same project where this works fine. Any ideas what might be causing this? أكثر...

I have a list of 3 SpatialPolygonsDataFrames. Every element has a number which is the perimeter. I want through a loop to store the numbers into one cell of a data frame like: 154,526,442. I tried to do that like this (in R): for (i in 1:3){ if (i ==1){...

I'm trying to learn GIS using QGIS through the courses offered in GeoAcademy fossgeo.org/free-qgis-courses/ I'm in the first course. One exercise in the course is about editing existing geospatial data. Basically, you add lines to an existing .shp: https://www.youtube.com/embed/yf7v9-e4diU...

I have adjacent polygons that I want to be marked out with dashed or dotted lines. This sometimes works but there appears to be a problem where the pattern isn't always synchronised on the shared boundaries which leads to odd patterns or solid lines. Is there a simple way round this? Using GQIS...

A before insert/update trigger on one of my CartoDB tables is not being raised. Same trigger is working in a local installation of PostGIS. This is my source table. And here, the trigger's code: CREATE OR REPLACE FUNCTION update_geom_column()RETURNS trigger AS$BODY$DECLARE coords_array...

How can I identify different features (like water, vegetation, bareland, settlement etc.) by the variation of different bands in spectral profile tool in erdas imagine 9.2. I am using landsat 8 image which contain 12 bands. أكثر...

After exporting a map as PDF in ArcGIS 10.3, the following error shows up in Adobe Acrobat: "An error exists on this page. Acrobat may not display the page correctly. Please contact the person who created the PDF document to correct the problem." In the map, there is as well a lack of...

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I am using a QGIS 2.12 project and I would like to know if it is possible to upload files and photos for each element in a layer. The files should be stored for example in C:\myproject\files I can't think of any feature in QGIS right now that could achieve this.. Any suggestion...

I'm creating a new route from point A to point B. Located in between the points is a barrier. While solving the route, the barrier is considered and a detour is made. So far, so good. However, the barrier is not permanent. It needs to be inactive between a certain time window. So I've added two...

What are your most important ArcGIS applications and modelling attempts/processes in hydrology, maybe more exact in surface hydrology, especially in mountainous environments? أكثر...