vmap0rhead

Read Vector Map Level 0 file headers

Syntax

vmap0rhead
vmap0rhead(filepath,filename)
vmap0rhead(filepath,filename,fid)
vmap0rhead(...),
str = vmap0rhead(...)

Description

vmap0rhead allows the user to select the header file interactively.

vmap0rhead(filepath,filename) reads from the specified file. The combination [filepath filename] must form a valid complete filename.

vmap0rhead(filepath,filename,fid) reads from the already open file associated with fid.

vmap0rhead(...), with no output arguments, displays the formatted header information on the screen.

str = vmap0rhead(...) returns a string containing the VMAP0 header.

Background

The Vector Map Level 0 (VMAP0) uses header strings in most files to document the contents and format of that file. This function reads the header string and displays a formatted version in the Command Window, or returns it as a string.

Examples

The following example uses UNIX® file separators and pathname:

s = vmap0rhead('VMAP/VMAPLV0/NOAMER/','GRT')
s =
L;Geographic Reference Table;-;id=I,1,P,Row 
Identifier,-,-,-,:data_type=T,3,N,Data 
Type,-,-,-,:units=T,3,N,Units of Measure Code for 
Library,-,-,-,:ellipsoid_name=T,15,N,Ellipsoid,-,-,-,:ellipsoid
_detail=T,50,N,Ellipsoid 
Details,-,-,-,:vert_datum_name=T,15,N,Datum Vertical 
Reference,-,-,-,:vert_datum_code=T,3,N,Vertical Datum 
Code,-,-,-,:sound_datum_name=T,15,N,Sounding 
Datum,-,-,-,:sound_datum_code=T,3,N,Sounding Datum 
Code,-,-,-,:geo_datum_name=T,15,N,Datum Geodetic 
Name,-,-,-,:geo_datum_code=T,3,N,Datum Geodetic 
Code,-,-,-,:projection_name=T,20,N,Projection Name,-,-,-,:;

vmap0rhead('VMAP/VMAPLV0/NOAMER/TRANS/','AEROFACP.PFT')
L
Airport Point Feature Table
aerofacp.doc
id=I,1,P,Row Identifier,-,-,-,
f_code=T,5,N,FACC Feature Code,char.vdt,-,-,
iko=T,4,N,ICAO Designator,char.vdt,-,-,
nam=T,*,N,Name,char.vdt,-,-,
na3=T,*,N,Name,char.vdt,-,-,
use=S,1,N,Usage,int.vdt,-,-,
zv3=S,1,N,Airfield/Aerodrome Elevation (meters),int.vdt,-,-,
tile_id=S,1,N,Tile Reference ID,-,tile1_id.pti,-,
end_id=I,1,N,Entity Node Primitive ID,-,end1_id.pti,-,

More About

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Tips

This function reads all VMAP0 files except index files (files with names ending in 'X'), thematic index files (files with names ending in 'TI') and spatial index files (files with names ending in 'SI').

File separators are platform dependent. The filepath input must use appropriate file separators, which you can determine using the MATLAB® filesep function.

See Also

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