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Geopointset is the format used by Metview to combine a set of Geopoints variables into a single entity for ease of processing. Thus, a set of observations can be grouped in the same way that fields are grouped into a fieldset variable. |
Creating a geopointset
A geopointset can be created with the create_geo_set() function, which takes any number of geopoints variables as arguments, or none. Both geopoints and geopointset variables can be concatenated to a geopointset.
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set1 = create_geo_set() # creates an empty set
set2 = create_geo_set(g1, g2, g3) # assuming that g1,g2,g3 are geopoints variables
set3 = set1 & g1 & g2 # set3 has 2 geopoints
set4 = set2 & set3 # set4 has 5 geopoints |
The Geopointset file format
The format for a geopointset file is very simply a header followed by a contatenation of geopoints files - see Geopoints for details of the format. The overall header is this:
The subsequent geopoints structures should all share the same format as each other. Here's an example with 3 geopoints files inside the set:
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#GEOPOINTSET
#GEO
# lat lon height date time value
# Missing values represented by 3e+38 (not user-changeable)
#DATA
69.6523 18.9057 0 20130512 0 100869.8625
63.4882 10.8795 0 20130512 0 100282.3392
63.5657 10.694 0 20130512 0 100241.1666
61.2928 5.0443 0 20130512 0 99852.18932
#GEO
# lat lon height date time value
# Missing values represented by 3e+38 (not user-changeable)
#DATA
60.82 23.5 0 20130512 600 101045.8
#GEO
# lat lon height date time value
# Missing values represented by 3e+38 (not user-changeable)
#DATA
55.01 8.41 0 20130513 0 100949.1809
54.33 8.6 0 20130513 0 101027.9101
53.71 7.15 0 20130513 0 100846.619 |
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