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LEGEND (System for Automated Geoscientific Analyses) is an open source geographical details system (GIS) utilized for modifying and analysing spatial information. It consists of a a great deal of modules for the analysis of vector (point, line and polygon), table, grid and image information. Among others the bundle consists of modules for geostatistics, image classification, forecasts, simulation of vibrant processes (hydrology, landscape development) and surface analysis.

Contents To run legend GIS on the Live DVD, open the Desktop GIS group on the Desktop and click on the SAGA link. When opening SAGA for the first time, you are presented with 3 subwindows: the Supervisor, the object Characteristic and the Messages window. The info in the things homes window will alter depending on your choice in the Supervisor window.

Attempt closing among the windows to get more location for your map. You can show closed windows again in the menu. Open the SAGA GUI and load the grid/ home/user/saga/ by means of the menu. You will get a message in the General tab of the Messages window concerning the success or failure of this job.

As soon as you loaded the dataset, it will appear in the Data tab of the Workspace window. It will be listed under Grids and the grid system it comes from. In this case, the grid system information will appear like. The very first number is the cell size (30 meters), the next two numbers show the number of cells in x and y instructions respectively, and the last two numbers are the origin of the grid.

This, and some more beneficial details on the dataset appear if you pick the Description tab of the Characteristic window. When you click on the tab, you will see not just more in-depth information on the grid system, however also the Value Type of the grid (here FLOAT), the Worth Variety, some statistical steps and the Memory Size.

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To show the dataset in a map view: Double click on the dataset in the Information tab of the Workspace window. A new Map window will open up with the dataset showed.

Try moving the mouse guideline over the map and see the x-, y- and z-coordinates showed in the bottom bar of the legend GUI window. The z-coordinates displayed represent the elevation worths of the dataset (understand that the values displayed are constantly those of the dataset picked in the Data or Maps tab).

The Zoom tool is selected by default. A left click the map focuses, a best click zooms out. Holding the left mouse button down, dragging to the opposite corner and letting the mouse button up allows you to zoom to a location of interest. Note If you focus a lot and switch on Program cell values on Settings tab, you will see that the cell worths are getting displayed.

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Take a look at the other buttons in the tool bar: these allow you to zoom e.g. to Complete Level. Suggestion Legend zooms very fast, if you are lost while browsing your data, click the 'Zoom to Complete Extent' button in the toolbar We will boost the map display by calculating a shaded relief map.

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Now choose the Analytical Hillshading module and after that select the Settings tab of the Residence window. This will appear the module specifications (likewise take a look at the Description tab, which will display more information about the module and its criteria). Click in the best column of the Grid system criterion (where [not set] is shown) and pick the grid system of the Mt.

Helens dataset (). Next click into the right column of the Elevation criterion and select the dataset. Click in the right column of the Shading Technique choice and choose Requirement. Now push the Apply and after that the Execute button. A new dataset containing the hillshade will be calculated. Take a look at the Data tab of the Office window - you will find the newly produced dataset.

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This will show the dataset in a brand-new map view. After checking the dataset, close the Map window by picking Close from the Window menu. Now double click the hillshade dataset again, but pick the Map consisting of the elevation dataset in the dialog popping up (Add layer to picked map).