Other ASCII files
[ LINES ] [ POINTS ] [ POINT2D ] [ SAMPLE ] [
GRIDREG
] [ TABLE ] [ TEXT ] [ POLYGONS ] [ NETWORK ] [ NETWORK_OBJECTS ]
POINTS
A POINTS file type is used for identification of lines or polygons entities, either
in a cadastral or in a thematic IL model. If the entity is of the point type (see
POINT2D), the identifiers are in the points file.
The identifiers file, usually with a file name extension *_LAB.spr, comes together
with the lines file, and it has its own syntax for thematic or cadastral data
identification. The SPRING knows how to differentiate the identification between lines and
polygons.
The figure below shows a lines map and a polygons map. To identify the three lines, independently
of the number of points in each line, it is required, in the POINTS file, three identifiers,
with X/Y coordinates over any point in each line. For both polygons, formed with three lines,
it is required two identifiers, with internal X/Y coordinates.
The data syntax inside a POINTS file type varies as a function of its purpose, that is:
- Identify lines/polygons in a cadastral map - it is required to inform a pair
of coordinates X/Y or Lat/Long, a label, a name (not mandatory) and an object category
which belongs to the line or polygon.
- Identify lines/polygons in a thematic map - it is required to inform a pair
of coordinates X/Y or Lat/Long and the thematic class that the line or polygon belongs to.
In the data section it is possible to use different formats:
- Define a character separator ( ; or , ) among the data through the SEPARATOR keyword;
- Use the keyword; CLASS_NAME, NAME, LABEL and CATEGORY_OBJ, described as follows:
- CLASS_NAME: identify lines or polygons from a thematic IL in its class;
- LABEL: identify lines or polygons using a label (unique) associated to an
object category in a cadastral map. Each entity can have one or several labels, but they
have to have different codes (see more about objects identification);
- NAME: indicates a name in a cadastral entity, it may have repeated names for
different labels;
- CATEGORY_OBJ: it is an identifier for the objects category, when the entity is
represented in a cadastral or network map.
NOTE: The X and Y coordinates of an identifier can be associated more than once to
the same geographic entity, when dealing with cadastral objects, independently if it is a
line or an area.
IMPORTANT: To import a polygon (area) identifiers file,
the lines building the polygon must be adjusted and polygonalized. The polygonalization and
the adjust can be executed when importing line entities (Line
with topology option), or in the editor window (see about polygonalization
and nodes adjust).
The next two examples show a thematic entity identifiers file and the other one for cadastral
entities. Notice that these files must begin using the keyword POINTS and end using
the keyword END.
POINTS
INFO
// Polygons and classified lines identifiers
// ASCII files generated by the SPRING system
// project Proj1 information layer Uso1996
// category Uso model THEMATICMODEL
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
NAME "Reforestation"
656937.129399 7405850.529104
CLASS_NAME "Urban"
657230.110953 7404143.297071
CLASS_NAME "Reforestation"
658557.145050 7406764.501808
CLASS_NAME "Urban"
657092.237280 7407005.928560
CLASS_NAME "Forest"
657643.931890 7495805.634533
579643.031970 7805605.933766
807643.231088 8305505.643743
345643.667319 8605555.683743
CLASS_NAME "Reforestation"
658850.126604 7403005.142383
CLASS_NAME "Urban"
659367.152876 7404971.045935
END
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NOTE: Notice that it is possible to have several entities (lines or polygons)
associated to the same thematic class, without repeating the keyword CLASS_NAME
in each line
in the file. In the example above there are 4 identifiers for the "Forest" class.
See next the cadastral objects identifiers example, but using the geographic
coordinates.
POINTS
INFO
// Polygons and classified lines identifiers
// ASCII files generated by the SPRING system
// project: Brasilia - Information Layer: Blocks_Map
// Category: Urban_Cadastre - Model: CADASTRALMODEL
DATUM SAD69, 6378160.000000, 0.003353, 0.000000, 0.000000, 0.000000
PROJECTION UTM/SAD69, 1, 0.000000, -0.785398, 0.000000, 0.000000
BOX o 47 57 15.14, s 15 50 37.46, o 47 50 44.85, s 15 43 40.70
UNITS Geographical
SCALE 25000.000000
INFO_END
CATEGORY_OBJ "Blocks"
LABEL "SQN-416"
NAME "SQN-416"
o 47 53 17.01 s 15 44 8.89
CATEGORY_OBJ "Blocks"
LABEL "SQN-415"
NAME "SQN-415"
o 47 53 14.09 s 15 44 19.50
CATEGORY_OBJ "Blocks"
LABEL "SQN-414"
NAME "SQN-414"
o 47 53 12.03 s 15 44 31.46
CATEGORY_OBJ "Blocks"
LABEL "SQN-413"
NAME "SQN-413"
o 47 53 3.85 s 15 44 45.39
END
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The same examples presented above could be represented by separators like semicolon
or comma:
POINTS
INFO
// Polygons and classified lines identifiers
// ASCII files generated by the SPRING system
// project: Brasilia - Information Layer: TESTE
// Category: Land_Use - Model: THEMATICMODEL
DATUM SAD69, 6378160.000000, 0.003353, 0.000000, 0.000000, 0.000000
PROJECTION UTM/SAD69, 1, 0.000000, -0.785398, 0.000000, 0.000000
BOX 183557.000000, 8246277.000000, 195017.000000, 8258937.000000
UNITS Meters
SCALE 10000.000000
SEPARATOR ,
// Format coordx , coordy , class_name
INFO_END
656937.129399 , 7405850.529104 , Reforestation
657230.110953 , 7404143.297071 , Urban
658557.145050 , 7406764.501808 , Reforestation
657092.237280 , 7407005.928560 , Urban
657643.931890 , 7495805.634533 , Forest
579643.031970 , 7805605.933766 ,
807643.231088 , 8305505.643743 ,
345643.667319 , 8605555.683743 ,
658850.126604 7403005.142383 , Reforestation
659367.152876 7404971.045935 , Urban
END
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NOTE: Notice that it is possible to have several entities (lines or polygons)
associated to the same thematic class, without repeating the class name in each line
in the file. In the example above there are 4 identifiers for the "Forest" class.
POINTS
INFO
// Polygons and classified lines identifiers
// ASCII files generated by the SPRING system
// project : Brasilia - Information Layer: Blocks_Map
// Category: Urban_Cadastre - Model: CADASTRALMODEL
DATUM SAD69, 6378160.000000, 0.003353, 0.000000, 0.000000, 0.000000
PROJECTION UTM/SAD69, 1, 0.000000, -0.785398, 0.000000, 0.000000
BOX 183557.000000, 8246273.000000, 195009.000000, 8258937.000000
UNITS Meters
SCALE 25000.000000
SEPARATOR ;
// Format coordx ; coordy ; label ; name ; category_obj
INFO_END
190485.563504 ; 8258165.416549 ; SQN-416 ; SQN-416 ; Blocks
190577.039063 ; 8257840.187344 ; SQN-415 ; SQN-415 ; Blocks
190643.566742 ; 8257473.262088 ; SQN-414 ; SQN-414 ; Blocks
190893.045539 ; 8257047.962359 ; SQN-413 ; SQN-413 ; Blocks
END
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NOTE: When exporting a Thematic or Cadastral Information Layer with lines and/or
polygon entity types, the Lines and Identif option in the
" Exporting" window, two files are
generated: the lines file (LINES) and the identifiers file (POINTS). By
default, when exporting an identifiers file the "spr" file name extension is
used and the "_LAB" suffix is added to the IL name, that is, *_LAB.spr. However,
when importing a file it is required that the file name has the extension "spr" if
it was created using a different system.
About the ASCII format
Learn more about Import/Export in SPRING
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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