CreateExtractMrSidImageryProgramNode
This command creates an ExtractMrSidImageryProgram node in the hierarchy. A program node is similar to a dialog-based wizard except the wizard is stored in the scene graph. This program extracts regions from the MrSid file and converts them to high-resolution and low-resolution GEOTIFF tiles suitable for use with Scenome. Typically this program produces thousands of output GEOTIFF tiles from a very large [ 1-2GB ] MrSid file.
Using This Command
Select Modify » Programs » Program: Extract Imagery MrSid from the main menu. You need to install GDAL and LizardTech third-party software to use this command.
- Create an ExtractMrSidImageryProgram node.
- Double click the ExtractMrSidImageryProgram node and configure its options.
- Right click on the node and select Execute This Command from the listed options.
- The command generates a batch file and drives command-line software that performs the extraction.
Figures
This command creates a ExtractMrSidImageryProgram node in the hierarchy. This node stores information used to extract GEOTIFF imagery from [very large / 1+ GB] MrSID files.
Figure 1.1. The ExtractMrSidImageryProgram node:
Figure 1.2. A very large MrSid file with the extract
region indicated by the bounding box. This MrSid file is 1.6 GB but the area-of-interest
is only part of the image and must be extracted separately. Otherwise you'll have tens-of-thousands
of irrelevant tiles or you'll have an enormous 80GB GEOTIFF. Even with region extraction, you do not wish to extract
a single enormous [ 10GB ] GEOTIFF; instead it's better to extract hundreds or thousands
of tiles @ 1000×1000 pixels. This program also produces low resolution tiles at
the same time.
Figure 1.3. Explanation of extraction parameters.
The upper left corner x/y is set as the start point. This extraction produces
six-thousand tiles @ 500×500 pixels each. The idea is to extract
a 30000×50000 pixel region and maintain manageable file sizes. This optimizes memory
use and disk access during terrain generation.
Registration
Command registration information is as follows:
| Category Type | Information |
| Implementation | SCRIPT |
| Module | PROGRAM_SCRIPTS.SSL |
| Category | Program Commands |
| GUID | {1F91FB19-F612-46D4-A453-4B81096121A9} |
| Source Name | CreateExtractMrSidImageryProgramNode |
| Interface Name | Program: Extract Imagery MrSid |
| Core | No |
| Sample | Yes |
| Access | Modify [programs] option on main menu. |
See Also
For more information: