Other ASCII files
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] [ TABLE ] [ TEXT ] [ POLYGONS ] [ NETWORK ] [ NETWORK_OBJECTS ]
SAMPLE
The SAMPLE file type is used for 3D samples of the
digital terrain models (DTM) represented by spot height and/or
contour lines (see figure below).

The first line of the file is the keyword SAMPLE. This line is the identification
section, which is mandatory. The following lines can have the following options:
- Keyword INFO and INFO_END, identifying the beginning and the end of the
information section, which is an optional section; or
- Keyword POINT3D identifying the beginning of the information section in the file
and next the data related to spot height. This section may or may not be present, depending
on the samples; or
- Keyword LINE3D identifying the beginning of the contour line This section may or
may not exist, depending on the samples.
The data section for a file of the SAMPLE entity is formed by spot height (POINT3D)
or contour lines (LINE3D) or both.
A set of spot height is identified by the keyword POINT3D followed by lines having
the point coordinates and its height. The keyword END identifies the end of a
spot height set.
Height lines in the data section of an ASCII file for the SAMPLE entity are
identified by the keyword LINE3D. The keyword HEIGHT determines the
height, and it is followed by coordinate pairs of the line points. The keyword END
identifies the end of a line.
The sequence END END shows the end of the data section in the file. There is no
constraint related to the number of instances of the POINT3D and LINE3D
entity in a file.
The following examples show two files of the SAMPLE type, one using planes coordinates and
another in geographic coordinates:
SAMPLE
INFO
// Topology samples
// ASCII file generated by SPRING system
// project Brasilia information layer Mapa_alt
// category Altimetry model DIGITALMODEL
DATUM SAD69, 6378160.000000, 0.003353, 0.000000, 0.000000, 0.000000
PROJECTION UTM/SAD69, 0, 0.000000, -0.785398, 0.000000, 0.000000
BOX 181972.256980, 8241710.934769, 202825.187176, 8264137.640522
UNITS meters
SCALE 25000.000000
INFO_END
POINT3D
187490.655018 8256234.947535 321.000000
185561.894539 8257949.960113 125.000000
189794.452258 8258485.901543 125.000000
189740.875578 8254734.311530 134.000000
END
LINE3D
HEIGHT 100.000000
184597.514299 8257360.424539
185026.127739 8258539.495686
186365.544739 8259664.972690
190651.679138 8259182.625403
190865.985858 8256127.759249
190705.255818 8253823.211098
188187.151858 8253448.052097
184597.514299 8257360.424539
END
LINE3D
HEIGHT 200.000000
185936.931299 8256074.165106
186954.888219 8258164.336685
188562.188618 8258057.148399
189419.415498 8257574.801112
186472.698099 8254787.905673
185615.471219 8254948.688102
185936.931299 8256074.165106
END
LINE3D
HEIGHT 300.000000
186740.581499 8255913.382677
186794.158179 8256342.135821
187062.041579 8256824.483109
187544.231698 8256931.671395
188401.458578 8256770.888966
186740.581499 8255913.382677
END
END
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SAMPLE
INFO
// Topology samples
// ASCII file generated by SPRING system
// project Brasilia information layer dddd
// category Altimetry model DIGITALMODEL
DATUM SAD69, 6378160.000000, 0.003353, 0.000000, 0.000000, 0.000000
PROJECTION UTM/SAD69, 0, 0.000000, -0.785398, 0.000000, 0.000000
BOX o 47 58 10.485, s 15 53 0.000, o 47 46 20.203, s 15 41 0.124
UNITS geographic
SCALE 25000.000000
INFO_END
POINT3D
o 47 54 58.385 s 15 45 10.299 z 321.000000
o 47 56 2.318 s 15 44 13.686 z 125.000000
o 47 53 40.026 s 15 43 58.165 z 125.000000
o 47 53 43.553 s 15 46 0.084 z 134.000000
END
LINE3D
HEIGHT 100.000000
o 47 56 34.958 s 15 44 32.411
o 47 56 20.023 s 15 43 54.282
o 47 55 34.550 s 15 43 18.305
o 47 53 10.938 s 15 43 35.900
o 47 53 5.148 s 15 45 15.292
o 47 56 34.958 s 15 44 32.411
END
LINE3D
HEIGHT 200.000000
o 47 55 50.607 s 15 45 14.825
o 47 55 15.470 s 15 44 7.346
o 47 54 21.579 s 15 44 11.551
o 47 53 53.032 s 15 44 27.613
o 47 53 53.576 s 15 45 5.937
o 47 56 1.921 s 15 45 51.261
o 47 55 50.607 s 15 45 14.825
END
LINE3D
HEIGHT 300.000000
o 47 55 23.709 s 15 45 20.414
o 47 55 21.711 s 15 45 6.502
o 47 55 12.496 s 15 44 50.944
o 47 54 56.263 s 15 44 47.677
o 47 54 40.627 s 15 45 26.218
o 47 54 53.264 s 15 45 29.534
o 47 55 16.641 s 15 45 29.220
o 47 55 23.709 s 15 45 20.414
END
END
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NOTE: When exporting a numeric IL with entities of the samples type (contour lines and/or
spot height), Samples option in the
" Exporting
" window, the SAMPLE file is created, and also the
LINES file if the IL has
breaking lines.
By default, when exporting a samples file the "spr" file name extension, added to the
"_L3D" suffix is added to the IL name, that is, *_L3D.spr. However, when
importing a file created by a different system the file name has to have the "spr"
extension.
About the ASCII format
Learn more about Import/Export in SPRINGG
See also:
How to IMPORT data?
How to IMPORT SGI data?
How to IMPORT GRIB images?
How to EXPORT data?
Other ASCII files
[ LINES ] [ POINTS ] [ POINT2D ] [ SAMPLE ] [
GRIDREG
] [ TABLE ] [ TEXT ] [ POLYGONS ] [ NETWORK ] [ NETWORK_OBJECTS ]
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