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I'm not very skilled on using postgis but I face a problem that I must solve, i.e. create tables to load geographical data stored as dxf. I have a thousand dxf files (3d) with polylines, points and polygons and I want to convert them to a postgis/postgres db. I'm in windows xp using postgres 9...

Now i'm working on the live tracking to track my vehicle.I want to get the directions to change the marker position based on the co-ordinates. I have using arrow icon for marker icon. I need to rotate the marker based on co-ordinates location. Thanks in advance أكثر...

I recently shifted maps and waypoints from Delorme Xmap to QGIS on my Mac and wish to use iPhone/iGIS as the GPS (together with the Garmin GLO receiver). Everything is good in QGIS, but I need USGS topos as the base maps in iGIS, not the generic Google stuff used by iGIS. The app wants users to...

I need to convert raster dataset (multiple band) to png file format but since 'Rasters come in many different formats and support different components. The specified pixel type, number of bands, or colormap are not supported by the output format.' unable me to do so. I have no idea how to revise...

I frequently have to use large tables and results from MS SQL in ArcMap and for that saving the data as .xls is one of the options. But when I add the data to arcmap, processes like joining and plotting the data take a lot of time. My question is that what would be the fastest method of...

I recently came across https://mapzen.com/ which offers some great resources. They seem well funded but do they have a revenue model? Do they provide paid services? أكثر...

I'm studding AI course and I need to create a routing or navigation program. I live in Barcelona and first at all I need Barcelona's street network data. I have found it here https://mapzen.com/metro-extracts/ (but I don't know it this data is good enough to use it in a navigation system)...

I have tried to upload an excel spreadsheet but I get a column with "invalid_the_geometry" and of course "the_geometry" column unpopulated. The result of the spreadsheet I am working with comes from a cvs file downloaded from a Fusion Table map from Google. I assume there is a hierarchy for the...

This is going to be short as I have to leave for the airport, but one of the more impressive presentations today at the overall outstanding UAS Reno 2015 conference was from Tom Breen at Headwall... Click Title to Continue Reading... أكثر...

I'm trying to import a dataset of UK postcode districts UK postcode districts from Google Fusion tables into geopandas with the aim of splicing it to a dataset of house prices. The problem is that geopandas doesn't seem to like either the CSV/KML version of the data. If I use the command...

I have a shape file with names for Regions. These don't seem to contain special characters but ugly hyroglyphes. What can I do do display them correctly. If I import the shape as UTF-8 it doesn't work... Also the Names are in a dbase table. So is it possible to save a dbase table in utf8 or is...

I have a small problem. I have begun rewriting code to work with an AxMapControl. Now at first this seemed to work and I was able to get a lot of code converted and working with the AxMapControl, but then I got to the GeoCoding part. I can't seem to figure out what to replace IApplication with...

I have 8 tiff files of an area in ireland, adding the grid references of locations of interest seems to be a problem. Can someone walk me through what to from inserting the tiffs into ArcMap to georeferencing to adding the grid references from an excel document? أكثر...

Any tutorial or study materails or links for ESRI GIS APAS-PLANTOPT. Thanks in advance. أكثر...

I'm able to run PyQGIS on my Mac (OSX 10.10.3) through the Python (2.7) console and through execution of Python files through my terminal. In order to do so, I added the following to my bash_profile: export PATH=$PATH:/Library/Frameworks/GDAL.framework/Programs/export...

There is a road network and two point feature classes. For one feature class, I need to calculate a field to hold road (not Euclidean!) distance from every point to a certain point in the other feature class. Is there a way of doing it in ArcGIS 10? If I understand correctly, what I need to do...

I used osm2po to get shortest paths but I would like to get travel time and osm links ids used in the path. Is it possible? Here is the osm2po service url format I use (this is an example)...

I'm trying to subtract from one shapefile the portions of another which overlap using the following: land.shp: subunits.shp lakes.shp COOKIE=subunits CUTTER=lakes; \ echo ''$$COOKIE'.shp'$$CUTTER'.shp' | \ ogr2ogr -f "ESRI Shapefile" \ land.shp /vsistdin/ \ -dialect sqlite \ -sql...

I can display a tile layer as an overlay in Leaflet via an url of the form path/to/my/tile/layer/{z}/{x}/{y}.png : my_overlay = L.tileLayer('http://path/to/my/tile/layer/{z}/{x}/{y}.png', {maxZoom: 17,minZoom: 9});I would like to be able to extract the value of this overlay (e.g. pixel RGB) at...

I'm using DotSpatial to aid in processing some geospatial data. I'm using the code below to determine if a point (lat/lon location) is within a polygon contained in the SHP. If the point is in a polygon, I want some of the attributes stored in the DBF associated with the polygon. How do I access...