Difference between revisions of "ConvertToXYZ"
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FILE_TYPE: is the parameter that defines the type of input data. It accepts values from 1 to 6 that indicate the following possible origins of data: | FILE_TYPE: is the parameter that defines the type of input data. It accepts values from 1 to 6 that indicate the following possible origins of data: | ||
| − | + | #NASA SRTM (Shuttle Radar Topography Mission) | |
| − | + | #ETOPO 2 (every 2') | |
| − | + | #ETOPO 5 (every 5') | |
| − | + | #Shoreline (Mapgen) | |
| − | + | #GEBCO (every 30´´ or 1') | |
| − | + | #ASCII (ArcView.....) | |
| − | + | #NASA SRTM30 (every 30´´) | |
INPUT_FILENAME: input data file, | INPUT_FILENAME: input data file, | ||
OUTPUT_FILENAME: where the results will be written, | OUTPUT_FILENAME: where the results will be written, | ||
Revision as of 17:11, 8 October 2010
ConvertToXYZ is a small tool that extracts baseline three-dimensional data into XYZ points files. It is useful, for instance, to extract baseline data to create bathymetries (or topography in land projects).
Quick Start
- Map a network drive to the data file (ETOPO, GEBCO, NOAA etc...).
- Create and edit a ConvertToXYZ.dat file. Save it in the same path of the executable.
- Run the executable.
Options file
WARNING: Only use integer coordinate lat/lon numbers.
FILE_TYPE: is the parameter that defines the type of input data. It accepts values from 1 to 6 that indicate the following possible origins of data: #NASA SRTM (Shuttle Radar Topography Mission) #ETOPO 2 (every 2') #ETOPO 5 (every 5') #Shoreline (Mapgen) #GEBCO (every 30´´ or 1') #ASCII (ArcView.....) #NASA SRTM30 (every 30´´) INPUT_FILENAME: input data file, OUTPUT_FILENAME: where the results will be written, TOP, BOTTOM, LEFT, RIGHT: Latitude and longitude minimum and maximum values (integers only!)
ETOPO2'
Here's what the options ConvertToXYZ.dat file looks like:
<begin_window> FILE_TYPE : 2 INPUT_FILENAME : Z:\etopo2.dat OUTPUT_FILENAME : WestIberiaET2.xyz TOP : 46 BOTTOM : 33 LEFT : -14 RIGHT : -5 MAXIMUM : 1 MINIMUM : -9999 WRITE_AS_BATHYMETRY : 1 CONVERT_TO_HDF5 : 0 <end_window>
SRTM30
Caution: make sure the ORIGIN_X and ORIGIN_Y correspond to the BOTTOM-RIGHT origin of the srtm30 original source file! Here's a map of srtm30 tiles.
<begin_window> FILE_TYPE : 7 TOP : 46 BOTTOM : 33 LEFT : -14 RIGHT : -5 MAXIMUM : 1 MINIMUM : -9999 INPUT_FILE : \\kepler\DataCenter1\DataCenter\DadosBase\Oceanografia\Batimetria\SRTM30\Data\w020n40.Bathmetry.srtm XYZ_OUTPUT_FILENAME : WestIberiaSRTM.xyz ORIGIN_X : -20 ORIGIN_Y : -10 <end_window>
NASA Topography
1) If you have NASA binary files (.hgt):
For land topography look on \\kepler\DataCenter1\DataCenter\DadosBase\Terra\Topografia\NASA
In Eurasia folder you will find data for Europe. Copy the .zip files you need (or all) to your Hard Disk and unzip them.
Run the ConvertToXYZ with a structure adapted to your needs:
<begin_window> FILE_TYPE : 1 LEFT : -9.28 RIGHT : -9.056 TOP : 38.99 BOTTOM : 38.75 INPUT_FOLDER : D:\Dados\NASA\ XYZ_OUTPUT_FILENAME : D:\Aplica\Trancao\Trancao.xyz SAMPLE_POINTS : 1 CONVERT_TO_UTM : 1 <end_window>
2) If you have NASA grids (e.g. SRTM from site):
Convert DEM grid to ascii (e.g. using ArcView ->File->ExportDataSource)
Convert ascii to .xyz using MOHID GIS (->Tools->ImportArcVieAsciiGrid). Select .xyz format and choose the filename and location.
