ConvertToXYZ

2012-10-18T10:08:54Z

Nilton: /* SRTM30 */

[[ConvertToXYZ]] is a small tool that extracts baseline three-dimensional data into [[XYZ points |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 indicates the following possible origins of data:
1 NASA SRTM (Shuttle Radar Topography Mission)
2 ETOPO 2 (every 2')
3 ETOPO 5 (every 5')
4 Shoreline (Mapgen)
5 GEBCO (every 30" or 1')
6 ASCII (ArcView.....)
7 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!)
WRITE_AS_BATHYMETRY: indicates if equal to 1 that the output is written in bathymetry format
WRITE_AS_POLYGONS: indicates that would produce outcoming files with polygons format *.xy when 1.

===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>

===NOAA Shoreline/Coastline===

The file ConvertToXYZ.dat to convert a coastline downloaded from the [http://www.ngdc.noaa.gov/mgg/shorelines/shorelines.html NOAA Marine Geology & Geophysics Shoreline/Coastline Data] would look like that:

<begin_window>
FILE_TYPE : 4
INPUT_FILENAME : Aysen-lowres.dat
OUTPUT_FOLDER : C:\Aplica\Ecomanage\Data\NGDC_NOAA_shorelines\Software\
OUTPUT_NAME : Aysen-lowres
WRITE_AS_POLYGONS : 1
MAX_BUFFER_SIZE : 250000
<end_window>

===GEBCO===
For [http://www.gebco.net/ GEBCO] bathymetric downloaded data the file would look like:
<begin_window>
FILE_TYPE : 5
INPUT_FILENAME : 60W30S_40W10S.cdf
OUTPUT_FILENAME : 60W30S_40W10S.xyz
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-LEFT origin of the srtm30 original source file! [http://www.dgadv.com/srtm30/ 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.

==See also==
*[[Digital_Terrain_Creator|Digital Terrain Creator]]

[[Category:Tools]]

MohidWiki - User contributions [en]

ConvertToXYZ