GDB Text Export (GTE)

Long name	GDB Text Export
Short name	GTE
File extension(s)	.gte

The GDB Text Export (GTE) format is supported in Read/Write mode.

The following is a description of the file syntax:

The file is not case-sensitive.
Comments can be inserted anywhere with a first character of #.
Empty lines are ignored.
The first line contains the signature: GTE_VERSION 1.0.

The file is divided into segments. Each segment contains several parts. These are described in the sections that follow.

Segment start

Segment

Segment name

NAME=name_of_segment

Segment description

DESCRIPTION=description_of_segment

Georeferencing

This is not mandatory, but if available, should have the following structure:

Starts with georeferencing: ProjInfo

Uses the following projection fields:

char	Units[20];	OUNITS
double	Dearth[2];	DEARTH
double	RefLong;	DRLON
double	RefLat;	DRLAT
double	StdParallel1;	DSPAR1
double	StdParallel2;	DSPAR2
double	FalseEasting;	DEFALS
double	FalseNorthing;	DNFALS
double	Scale;	DSCALE
double	Height;	DHEIGH
double	Long1;	DLONG1
double	Lat1;	DLAT1
double	Long2;	DLONG2
double	Lat2;	DLAT2
double	Azimuth;	DASIMU
int	LandsatNum;	LSAT
int	LandsatPath;	PATH

Fields

The Fields part explains the fields (or attributes) that are attached to each record of the segment. The following are defined:

The start of the field: Fields

The field index, name, and type:

Field <field index> <field name> <field type> <field format>

<field index>	Integer, starts with 0 for the first field
<field name>	String, enclosed by "". For example: "REPCode"
<field type>	Can be Integer, Double, Float, String, or CountedInt
<field format>	Can be %s,%d,or %g

Default fields to use: represents the necessary fields for the system.
```
RepCodeField <field index> * 
GroupField <field index>
AngleField <field index>
HeightField <field index>
TextField <field index>
  
```
* <field index>: one of the indices of the fields defined in the previous table or -1 if not set.
For a field of CountedInt :
- If there are no values, 0 should be used. For example:
```
non value: 
0
```
- The first value indicates the size of the remaining values.
- Values are separated by commas. For example:
```
array containing 3 values (5 7 9):
3,5,7,9
```

Layer metadata

The following structure is used:

Start of the metadata: GTELayerMetaData
Any type of metadata associated with the layer
End of the metadata: GTEEndLayerMetaData

RST associated with the layer

The following structure is used:

Start of the RST: GTELayerRST
Complete description of the RST associated with the layer. If no RST is associated with the layer, this part will not be present.
End of the RST: GTEEndLayerRST

Header end

The header represents the segment name and description, the projection information, the fields information, the layer metadata, and the associated RST.

EndHeader

Record

The Record part contains the actual field values and geometry information, as follows.

Start of the record: Record
Values for each field defined in the field part
Start of the vertices: Vertices <number of vertices>
Coordinates of the records: <X value>, <Y value>, <Zvalue> (one for each vertex until <number of vertices>)
The end of the record: EndRecord

Segment end

EndSeg

File metadata

The following structure is used:

Start of metadata: GTEFileMetaData
Any metadata associated with the current file
End of metadata: GTEEndFileMetaData