Geospatial Use Cases [1]
R Analytical Environment
Read and write ESRI Shape Files [2]
Demonstrates techniques from three R packages for reading, displaying, and writing ESRI Shapefiles
Display R Spatial Objects with Google Maps / Google Earth [3]
Demonstrates creation of Keyhole Markup Language (KML) files for vector ESRI Shape Files and raster GeoTIFF files, enabling their display in GoogleEarth / Google Maps
Read and Display Data from GPS Devices Using R [4]
Two examples demonstrate the use of the R environment to process data sets from GPS devices: Read/Translate/Display/Write ASCII Point Files.
Point-in-Polygon Assignment to Point Data Set Members [5]
Associate points in a data set with the polygons in a second data set that surround them
Compute Shortest Path between points in Euclidean Space [6]
Compute a matrix of shortest-path distances between spatially-referenced points in a region
Overlay Points on Satellite Image / Extract Pixel Values [7]
Use R geospatial classes to assign MODIS Image temperature values to georeferenced point locations.
Sampling Vector Polygon Data Using Point Grid Overlay [8]
Overlay a regularly-spaced grid of points on the Bailey's Ecoregions map of the United States, and extract the Bailey's region number underneath each point.
Compute Centroids for a Polygon set [9]
Demonstrates computation of Centroid (Center of Gravity) points for a polygon data set stored in an ESRI Shape File
Compute Convex Hull/Region of Interest Polygons for Point Data Sets [10]
Given a point data set AND a polygon data set whose members surround the point set members: 1) Compute the polygon areas; 2) assign each point its 'bounding polygon'; 3) calculate the convex hull bounding the point data set; 4) generate Region of Interest (ROI) polygons surrounding each point data set member
Explore the relationships of spatially coincident point and polygon data layers using R geospatial tools
Assign Closest Points to members of a separate point data set [12]
Input two geocoded point data sets from .csv files into R workspace, then assign to one data set the closest point locations from the other
Polygon Dissolve Operations [13]
Aggregate spatial data polygons into larger polygons along with their descriptive attributes, using a spatial primary key
Join and Query Relational Data Tables With R [14]
Join and perform relational queries on multiple attribute tables. Compute summary statistics using the joined tables.
Create Maps With R Geospatial Classes and Graphics Tools [15]
Generate various types of publication-quality maps using standard R graphics tools
Cartographical Map Projections: A Discussion [16]
A comprehensive introduction to the art, science, and application of map projections
Integrate C Language Function Into R With an R Package [17]
A step-by-step tutorial, including a complete, downloadable example, demonstrating the creation and use of an R package that calls a C function performing simple matrix calculations
ESRI ArcMap GIS
ArcMap GIS: Use Mouse to Point/Click/Extract Image Values From Raster Data Layer (12 kb Pdf) [18]
Change the Latitude/Longitude display units and extract single-pixel values using the mouse
ArcMap GIS Overlay Polygon Coverage Generation (33 kb Pdf) [19]
Create a Point Shape File attribute file by performing a series of Spatial Join operations
ESRI ArcMap GIS Spatial Overlay Analysis (31 kb Pdf) [20]
Use Polygon Shape Files to perform raster data set clipping operations
Interactively Extract and Save Arc Map GIS Shape File Subset (9 kb Pdf) [21]
Use the mouse to select and write a subset of existing ESRI Shape File to new Shapefile
