Category: Geographic Information Systems

Shapefile to GeoJson conversion using C#

How do I convert shapefiles to GeoJSON? You can convert a Shapefile map into a GeoJSON map using this tool as follows: Create a ZIP of your map files. The three files required have the extension . Press the blue button “CONVERT TO GEOJSON’”. To save it, press CTRL + S (or, depending on the

Calculating average stream slope at each location along stream using ArcGIS Desktop?

How do you find the average slope in Arcgis? How To: Calculate the average slope of an area using contour… Convert the contours to a surface using the Topo to Raster tool, found in the Interpolation Toolset in either 3D Analyst or Spatial Analyst toolbox. Calculate the slope using the surface created in step 1

Calculating new field to represent sum of values in existing field in ArcMap?

How do I calculate a field based on another field in ArcGIS? Procedure In ArcMap, right-click the selected layer in Table Of Contents, and select Open Attribute Table. In the attribute table window, create a new field. In the Editor toolbar, click Editor > Start Editing. Right-click the newly created field, and select Field Calculator.

How to install shapely for python 2.6 (Mac) NOT 2.7?

How to install shapely for Python? Install Shapely on Windows Find out your whether you are using Windows 32-bit or 64-bit. Go to Settings => System => About => System Type . Find out your python version. pip install wheel. Go here and download the wheel corresponding to items 1–2. pip install \ .  

Creating labels with table style

Convert .mdb file shape area and length units to meter with Qgis

How do I convert units in Qgis? If you want the measurements to be expressed in meters, simply switch units in Settings>Options>Map Tools> Preferred distance units. 

Convert a raster to GeoJSON polygons in PostGIS

How do you convert raster to polygon? Navigate to ArcToolbox > Conversion Tools > From Raster > Raster to Polygon. In the Raster to Polygon window, specify the raster created in Step 2 in the Input raster field. Specify the name and location for the output polygon feature class. Fill in any optional parameters.  Does

Plotting and analyzing extracted elevation data in R?

How do I get elevation data in R? Get Point Elevation Data. Point elevation is accessed from get_elev_point() . This function takes either a data. frame with x (longitude) and y (latitude) locations as the first two columns or a SpatialPoints/SpatialPointsDataFrame as input and then fetches the reported elevation for that location. 

Showing which way line features are oriented in QGIS?

How do I show line direction in QGIS? Open QGIS and add your vector data. Right click the layer and go to properties -> Symbology. Add a marker line symbol by pressing the plus button. Change the marker line placement to on central point. Change Simple Marker to a triangle and be sure to set

Grid thematic map in Mapinfo

How do you make a thematic map in mapinfo? Creating an Individual Value Thematic Map Open the Thematics Map tab. Click on Create New Thematics from drop-down list. From the Table drop-down list select a table on which you would want to apply thematic. From the Column drop-down list, select a column on which you