Tag Info

Hot answers tagged

3

I would use either the Con or Reclassify tools to create a new raster with the value range that you are interested in and then perform the raster-to-vector conversion on this newly created raster. Two steps and you're done!


2

There are a number of sources with examples showing what syntax can be used for rasters. Basically, common mathematical logics are used such as: Mathematical (+, -, *, /) Trigonometric (sin, cos, tan, asin, acos, atan) Comparison (<, >, =, <=, >=) Logical (AND, OR) Here you can find how some of those syntax are used in some examples. Other sources ...


2

ArcGIS solutions: Convert the x,y,z data to a feature class then: Build a TIN using x,y,z data and then convert this to a raster. Interpolate the x,y,z to raster. Use Anudem (topo2raster) to create a DEM. Convert point to raster and just set a cell size that is suitable for your x,y,z data (usually only for dense data). I would output a GeoTiff. x,y,z ...


2

In ArcGIS, use the Resample tool to resample two of the three rasters into a cell size that matches the third on. You'll need to consider what you're doing to your data when you resample. With that in mind I would pick the Land Use raster as the one that goes unmodified since the others are likely already interpolations of discrete samples of continuous ...


2

If the rasters have the same basis (extent, resolution etc) then you just get the values and plot them. Something like: plot(values(r1), values(r2)) I'm not sure exactly what the "correlation of determination" is, but the simple "correlation" can be computed by: cor(values(r1), values(r2)) Note these are both dependent on the rasters having identical ...


2

You just right click the layer and select Properties. Then go the Metadata tab. Scroll down and look for "Pixel Size".


2

The plugin layer has no functionality to export to an image file. Instead, you can save map canvas image (File - Save as Image. A world file is outputted together), and then convert the image to GeoTIFF with the Translate (Convert format) tool of GDALTools. In the tool dialog, the target SRS field should be filled with the CRS of your map (EPSG:27039).


2

The raster constraints are used to ensure that all rasters have the same SRID, pixel dimensions, pixel types and alignments, as you can see from RT_AddRasterConstraints docs. These are important if you want to do intersections, resampling, unions, reprojections, or vector-raster overlays, etc, as I'm sure you know. I was surprised that you could add an ...


1

For those who want to do this in 10.2, this modification of above worked for me: # Import system modules import sys import string import os import arcgisscripting # Create the Geoprocessor object gp = arcgisscripting.create(10.2) # Load required toolboxes... gp.AddToolbox("C:/Program Files (x86)/arcgis/Desktop10.2/ArcToolbox/Toolboxes/Data Management ...


1

I have a similar situation - point data stored in PostGIS database and I need display heatmap of this points in web. I write shell script (put in cron for automatically update raster if changes values in points) which make next: convert data from PostGIS table in local csv file (x,y,value) using gdal_grid command I receive TIFF raster from values of csv ...



Only top voted, non community-wiki answers of a minimum length are eligible