Custom Processing Scripts

LAS_GROUND.sml
LASextractByRegion.sml
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Automatically Update Geomashup using SML and Job Processing. Processing scripts written in the TNT geospatial scripting language (SML) can access LIDAR point data directly from standard LAS files, process the points, and create new LAS files to contain the results. The LIDAR points do not have to be imported to an internal TNT geospatial format at any point in this processing. SML's ability to work directly with native LAS files can save a significant amount of processing time that would otherwise be needed to import files that can contain millions of points. To demonstrate direct processing of LAS files using TNT geospatial scripts, MicroImages has prepared several sample scripts. The LAS_GROUND script illustrates how an SML script can use LIDAR point classifications to control processing. It copies only points classified as Ground to a new LAS file. These ground points could then be used as input to generate a bare-earth elevation raster. The LASextractByRegion script uses a region to extract all LIDAR points within the region to a new LAS file

canvquakes.sml
canvquakespkg.zip
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Automatically Update Geomashup using SML and Job Processing. MicroImages has prepared a demonstration of an automated, regularly-scheduled geomashup application that downloads updated geospatial data from the Internet, processes and combines the data with other geospatial data, and posts the result on a web page for viewing in the Google Earth browser plug-in. The source geospatial data for this demonstration are global earthquake epicenter locations and associated attributes posted and continuously updated by the U.S. Geological Survey. The key component of the application is a custom processing script written in the TNT Geospatial Scripting Language (SML) that is run hourly by the TNTmips Pro Job Processing System. This script downloads the earthquake data, extracts the data for the desired area, sets up styles and DataTips, and renders the result to a KML file that is referenced by a web page that loads this file in the Google Earth browser plug-in. This sample script, associated reference data, and the sample web page are available for download in a Zip archive.

TiffToJP2getJobParms.sml
TiffToJP2fromJob.sml
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Script Example Using Job Processing. You can combine geospatial scripting and TNTmips Job Processing to perform specialized batch processing. A pair of scripts is required for such a task: an Input/Output script to collect user inputs and create one or more job files, and a Process script to obtain the processing parameters from each job file and perform the actual custom processing. This custom job processing example performs batch conversion of a set of four-band TIFF files to compressed JP2 files. The Input/Output script TiffToJP2getJobParms provides a dialog for selecting input TIFF files, an output directory, and JPEG2000 compression settings. It makes a job file for each input that includes these parameters and that calls the processing script TiffToJP2fromJob to perform the conversion.

MapUnitAreas.sml
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Tabulate Map Unit Areas for Watershed Catchments. Designed to relate the results of the Sample Catchments script to a geologic, soil, or other vector object containing map unit polygons. For each catchment the script tabulates the area and percent area of each intersecting map unit. These values are written to tables attached to copies of the original catchment polygon vector and sample point vector object. This generalized version of the GeolUnitArea script automatically compiles a list of unique map units from the selected vector object and tabulates areas for all units or optionally for a single target unit.

GeotagDbase.sml
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Add Geotags to Database Records. Standalone script automatically adds geotag information to a database table containing records of point observations. The script requires that the source table include fields with the date and time of observation for each record and requires a concurrent GPS track log. The source table is copied, fields with Latitude, Longitude, and Elevation are added for each record, and the new result table is placed in the same database object as the source.

GPSphoto2.sml.
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Add Geotags to Digital Photos. Customizable standalone script determines locations for any number of digital photo files in JPEG format and creates a point vector object with an attached database table with the photo and geotag information. Geotagging can be done automatically using the date and time recorded in each photo's EXIF header and one or more GPS track logs, or coordinates can be obtained visually by indicating photo locations on a georeferenced image.