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I have the same problem as this How to set up QGIS print composer options from the python console? I have a composer template called "Template", I can open it with the python console but not edit the map content. I'm very new to python so its likley to be something simple Ive overlooked. The...

The only thing anywhere close to what I describe in the title is this site: http://lpetrich.org/Science/GeometryDemo/GeometryDemo_GMap.html. It has a couple problems, though: 1. There is no easy to way to preserve whatever map one makes and 2. Sometimes, if two points are too close together the...

A video lecture designed for teaching the*Geographic information system (GIS) Data Models*at the Rochester Institute of Technology (RIT). For questions, comments and more information, contact: Brian Tomaszewski, Ph.D. Department of Information Sciences & Technologies Rochester Institute of...

علم الخرائط أو فن رسم الخرائط هو دراسة وممارسة رسم الخرائط. يستخدم لرسم الخرائط تقليدياً القلم والورق، ولكن انتشار الحواسب الآلية طور هذا الفن. أغلب الخرائط التجارية ذات الجودة العالية الحالية ترسم بواسطة برامج كمبيوترية. يعرف علم الخرائط تطورا مستمرا بفعل ظهور عدد من البرامج التي نساعد على...

I've successfully installed tilestache on my server and able to load a geojson from it. But when I change the config file to use disk cache, the server return 500 on requesting the tiles.What I add to my config file: "cache": { "name": "Disk", "path": "/tmp/stache", "umask"...

I have a point and around it lines and polygons in the rule of obstacles. I want to connect the point to each of the lines, with a line, such that this connecting line is not intersect any obstacle (polygon) on it's way. Note - sometimes it's my be not possible - means there will be some lines...

I have an ArcGIS file geodatabase with two featureClasses. One is a point featureClass which represents the centroids of the cells of a regular grid. The second represents the corners of each grid cell. This is a multipoint of up to four points per location, because of neighbouring grid...

I have created form with axMapControl and comboBox with values of possible scales (e.g. 1:1 000 000, 1: 500 000, etc). How can I change current map scale programmaticaly by using value from selectedItem taken from Combobox? أكثر...

I have a GeoTIFF raster in ArcGIS, which can be downloaded from the following two links: http://www.rtwilson.com/downloads/MODIS_MOD04_16-06-2006_Subset.tfw http://www.rtwilson.com/downloads/MODIS_MOD04_16-06-2006_Subset.tif If you load these into ArcGIS you will see large uniform...

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I have satellite raster data is converted in to pixels using create table gtru_tile_pix as SELECT (ST_PixelAsPolygons(rast)).val, (ST_PixelAsPolygons(rast)).geom FROM gtru_tile_raster; and i have vector data (polygons)in other layer to get sample pixels from the above...

right now the tiles and folders generated by gdal2tiles are named as numbers starting from 0 successively.How to make them represent xyz coordinates, so that their names satisfy {z}/{x}/{y} rule for Leaflet? أكثر...

I have 7000 points, and for each point I want to create a OD cost matrix of that point to all other points and write the result in separate tables - that is 7000 tables with 6999 records each. Solving the OD cost matrix (arcpy.na.solve) is initially fast (takes about 3 seconds) for each origin...

I want to dissolve a feature class of land use polygons, joining subparcels in larger parcel polygons. I want the parcel polygon to keep the dominant land use of all subparcels, taking into account the surface that each subparcel takes. Dissolve GP tool lets me calculate statistics over one...

I need to interpolate values from points to polygons. I have a point shapefile and a shapefile of adjacent polygons. Some polygons get several points falling inside, some have nothing.I thought about interpolating values for polygon centroids only, but this is rather crude. I would like to take...

In an effort to migrate a script that transfers attributes from a geometric network to a feature class (on a given network edge segment, what are the up and downstream junctions?) I would like to determine what the equivalent function in python for the following VBA/.Net IEdgeFeature Interface...

Job Purpose: To coordinate and manage all movements of shipments coming in and out of Dubai, both domestic and international. Responsible for shipment bookings in all mode of transports and ensure all transactions are covered in accordance to the local Operations processes while maintaining...

The melting of stagnant, buried glaciers left North Dakota’s Turtle Mountains pockmarked with depressions that became ponds and lakes. أكثر...

I am exploring Spatialite in QGIS (2.10.1), and it is very slow to save tabular edits (with 1200 records, several minutes once I click the pencil button, versus less than 1 second with the data as a shapefile!!!). Here's my workflow: Add Vector a shapefile into QGIS and then Save As a...

I have a map I'm working on with Leaflet that displays a choropleth of zip code-level data. One piece of functionality I would like to add is to allow users to use a range slider to filter out polygons (zip codes) based on some values of the associated metadata. In this case, each zip code in...