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| − | == Outcomes ==
| + | #Redirect [[Tarsier tutorial: Rendering symbols from rasters]] |
| − | *Render Fort Ord in a 3d realistic virtual reality
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| − | *Use your land cover map to populate the visualization with trees and shrubs where appropriate, and at a density dictated by your % green cover map
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| − | | + | |
| − | == Prerequisites ==
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| − | *[[Tarsier Installation|Download and install Tarsier]]
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| − | | + | |
| − | '''Data'''
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| − | *Fort Ord land cover map derived from Landsat (and associated land cover metadata)
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| − | *Fort Ord % green cover derived from Landsat
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| − | *DEM (download from USGS - http://seamless.usgs.gov/index.php)
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| − | *NAIP imagery (also download from USGS)
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| − | == Recomended Reading ==
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| − | | + | |
| − | [[Tarsier tutorial: Raster data]] | + | |
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| − | [[Tarsier tutorial: Raster resampler]]
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| − | | + | |
| − | [[Tarsier tutorial: Renderer]]
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| − | | + | |
| − | [[Tarsier tutorial: Simple fly-through]]
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| − | == Intorduction ==
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| − | In your remote sensing class (external link perhaps?) you have developed and ground truthed a land cover map. . .
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| − | | + | |
| − | == Simplify the land cover map ==
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| − | Your land cover map has too many classes for our purposes. We will want to reclassify the map distilling the classes down to just three: trees, shrubs, and other. This process could be done in other programs as well, but here is how it is done in Tarsier:
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| − | # Open Tarsino
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| − | # Open your Fort Ord land cover map:
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| − | ## ->File ->Open
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| − | ## Navigate to your land cover map and double click the file
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| − | # Open the Raster Lookup tool:
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| − | ## ->File ->New ->Tools ->Raster Lookup
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| − | # Load the land cover map into the Raster Lookup
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| − | ## In the Raster Lookup view, use the drop down box next to '''Input Raster:''' to select your land cover map
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| − | # Click the '''Find Values''' button
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| − | # To the right of '''Lookup Table Data:''', click the '''View''' button. This will display a table with a column, '''Input''', for all the values from the input raster (your land cover map) and another column, '''Output''', that will dictate the new values for the reclassified map.
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| − | # Reclassify the map.
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| − | ## Right now the "Output" column is filled with "-9999" which is the default null value. This will be the value of your "Other" class.
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| − | ## For any input value that you think represent forest or trees, edit the corresponding output value by typing a "1" into the cell.
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| − | ## For any input value that you think represent shrubs or chaparral, give the output value a "2".
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| − | # After you have finished editing the table, click the '''Execute''' button on the Raster Lookup view.
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| − | # View and save your reclassified raster
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| − | ## To the right of '''Output Raster 0:''' click the '''View''' button
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| − | ## Save the raster: With the Raster View window active, ->File ->Save As. . . Save your raster to an apropriate location. Tarsino will recognise file names up to 255 characters (no spaces), so name your file something informative like "'Original file name'_ReclassifiedTo.Trees.Shrubs.Other.'yymmdd'.tra".
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| − | | + | |
| − | == Creating Raster Symbol Scheme ==
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| − | The reclassified map has three classes, one of which is null (Other). You now need to let Tarsier know how you want the non-null classes to be visually represented in a render. One way to do this is to create a [[Tarsier: Raster Symbol Scheme|symbol scheme]].
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| − | # Export your reclassified map to a Raster Symbol Scheme
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| − | ## Make sure your the raster view window is active, if not click on it
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| − | ## ->Raster ->Export to RasterSymbolScheme (This should open a new view window)
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| − | # In the RasterSymbolScheme view you will see a list of all the non-null values from your reclassified raster. Click on '''unnamed 1''' to edit its properties
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| − | ## Recall that the value "1" is to represent trees, so in the box next to '''Tag''' type Trees
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| − | ## Set the '''Max Height''' to something reasonable for a Fort Ord tree, maybe 7
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| − | ## Click '''Load Texture''' and navigate to your Oak.bmp
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| − | ## Set the '''Transparent Color''' bar to the background color of the *.bmp file to make it transparent
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| − | # Similarly edit the properties for the shrub class (unnamed 2)
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| − | | + | |
| − | == Visualizing Fort Ord with the Renderer ==
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| − | # Open the [[Tarsier: Renderer| Renderer]]
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| − | ## ->File ->New ->Data Views ->Render view
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