This dataset is for all of the tutorials noted below. This dataset is a zip file and it is approximately 75 MB. Click the download link below to download the zip file to your computer. Once the download has completed, unzip this file and place the extracted folder “Grid Analysis Tutorials” on your C drive (C:\Grid Analysis Tutorials\).
The Advantage and Professional triers of the GeoMedia Desktop include a suite of Grid Analysis tools. This tutorial introduces you to the most important Grid Analysis concepts and functions. Even though this tutorial is a prerequisite for the other Grid Analysis tutorials listed below, the Grid Analysis Tutorials are all independent of each other.
This tutorial presents a least-cost routing example. The core concept is that costs can be assigned to building a roadway through each type of land use area, and a least-cost path between pre-defined start and stop points can be determined. These costs can include not only the traditional land acquisition and construction costs, but costs associated with mitigating environmental damage, acquiring compensatory acreage, and so forth.
This tutorial demonstrates a typical workflow used for a hydrological analysis of a drainage basin. In this tutorial you learn how to use a Digital Elevation Model (DEM) to delineate stream networks in a basin. Hints on using Grid Analysis commands for other types of hydrological analysis are included throughout.
Grid Analysis users can use the Import File(s) command to prepare elevation files for use with Grid Analysis commands, however, for those users wishing to process large collections of elevation data, it is recommended that the Elevation Workbench command be used. This command streamlines the import process and ultimately provides greater flexibility. The aim of this tutorial is to demonstrate how to make use of this command.
The aim of this tutorial is to demonstrate a typical workflow used to combine grid layers of differing projections. The tutorial shows you how to import, mosaic, and reproject a set of grid layers with differing resolutions, datums, and elevation units. Specifically, you will learn how to import multiple grid layers, tile together adjoining coverages, and re-project the result to a different geographic projection.
This tutorial demonstrates a typical workflow used to perform a viewshed analysis. You are introduced to commands used to create a viewshed from a Digital Elevation Model (DEM). Hints are provided for extending the use of the Viewshed command. Viewshed analysis is a fundamental technique in grid-based GIS and has many applications in resource development and tourism.
In this tutorial, Grid Analysis commands are used to carry-out a Natural Heritage Study. The information that stems for this type of analysis allows planners to assess the impacts of land-use changes or restoration projects on individual natural areas and on the larger landscape.
This tutorial is based on a project that was carried out by Christchurch City Council in New Zealand. The main purpose of the project was to create a set of maps that could effectively communicate contamination levels within a residential area so that intelligent decisions pertaining to any remediation could be made. In this tutorial, you create a set of maps that effectively communicate contamination levels within a residential area.
In this tutorial, you produce a 2.5 meter DEM for a city area. Once the DEM has been created, you: create a Choropleth map of elevation, use the Shaded Relief and Calculator commands to produce a Shaded Relief Model, use the Blend command to create a shaded relief mode that is tinted by the colors present in the Choropleth map of elevation, and finally use the Isoline command to produce 5 meter contours that match the color gradation in the Blended map.
This tutorial provides an example of the steps involved in creating a custom Grid Analysis command. Using the Visual Studio 2010 IDE and the GeoMedia InstallAppCmd utility, a command can be created and added to GeoMedia Desktop.