Difference between revisions of "Visualizing a land cover map of Fort Ord, California"
From CCoWS Wiki
| Line 18: | Line 18: | ||
# Open Tarsino | # Open Tarsino | ||
# Open your Fort Ord land cover map: | # Open your Fort Ord land cover map: | ||
| − | ## File->Open | + | ## ->File ->Open |
## Navigate to your land cover map and double click the file | ## Navigate to your land cover map and double click the file | ||
# Open the Raster Lookup tool: | # Open the Raster Lookup tool: | ||
| − | ## File->New->Tools->Raster Lookup | + | ## ->File ->New ->Tools ->Raster Lookup |
# Load the land cover map into the Raster Lookup | # Load the land cover map into the Raster Lookup | ||
## In the Raster Lookup view, use the drop down box next to '''Input Raster:''' to select your land cover map | ## In the Raster Lookup view, use the drop down box next to '''Input Raster:''' to select your land cover map | ||
| Line 33: | Line 33: | ||
# View and save your reclassified raster | # View and save your reclassified raster | ||
## To the right of '''Output Raster 0:''' click the '''View''' button | ## To the right of '''Output Raster 0:''' click the '''View''' button | ||
| − | ## Save the raster: With the Raster View window active, | + | ## 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)0, so name your file something informative like "'Original file name'_ReclassifiedTo.Trees.Shrubs.Other.'yymmdd'.tra" |
| − | == Creating | + | == Creating Raster Symbol Scheme == |
| − | The reclassified map has three classes, one of which is null (Other). You now need to let Tarsier know how you want | + | 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]]. |
| + | # Export your reclassified map to a Raster Symbol Scheme | ||
| + | ## Make sure your the raster view window is active, if not click on it | ||
| + | ## ->Raster ->Export to Symbol Scheme (This should open a new window) | ||
# | # | ||
| + | |||
| + | == Visualizing Fort Ord with the [[Tarsier: Renderer| renderer]] == | ||
Revision as of 18:44, 17 November 2009
Contents
Outcomes
- Render Fort Ord in a 3d realistic virtual reality
- Use your land cover map to populate the visualization with trees and shrubs where appropriate
Prerequisites
- Fort Ord land cover map
- Habitat classification chart
Intorduction
In your remote sensing class (external link perhaps?) you have developed and ground truthed a land cover map. . .
Simplify the land cover map
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:
- Open Tarsino
- Open your Fort Ord land cover map:
- ->File ->Open
- Navigate to your land cover map and double click the file
- Open the Raster Lookup tool:
- ->File ->New ->Tools ->Raster Lookup
- Load the land cover map into the Raster Lookup
- In the Raster Lookup view, use the drop down box next to Input Raster: to select your land cover map
- Click the Find Values button
- 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.
- Reclassify the map.
- Right now the "Output" column is filled with "-9999" which is the default null value. This will be the value of your "Other" class.
- For any input value that represents forest or trees, edit the corresponding output value by typing a "1" into the cell.
- For any input value that represents shrubs or chaparral, give the output value a "2".
- After you have finished editing the table, click the Execute button on the Raster Lookup view.
- View and save your reclassified raster
- To the right of Output Raster 0: click the View button
- 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)0, so name your file something informative like "'Original file name'_ReclassifiedTo.Trees.Shrubs.Other.'yymmdd'.tra"
Creating Raster Symbol Scheme
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 symbol scheme.
- Export your reclassified map to a Raster Symbol Scheme
- Make sure your the raster view window is active, if not click on it
- ->Raster ->Export to Symbol Scheme (This should open a new window)
