Feature Class Z to ASCII Tool | Conversion toolset | From Feature Class | 3D Analyst ArcToolbox

Summary
Exports 3D features to ASCII text files storing GENERATE, XYZ, or profile data.

Usage
The Profile option writes a two-column ASCII file that converts 3D line features into records which can be used to generate line graphs. Each line from the source feature class will be written to a separate file whose name is appended with the line's unique ID. Each row in the ASCII file will contain the distance from the starting position of the line to the vertex (D) followed by the elevation at that vertex. When loading the resulting ASCII file into a graphing application, the first column would be used to define the x-axis and the second column would be used to define the y-axis.

0 z1
D1 z2
D2 z3
D3 z4
The XYZ option writes x-, y-, and z-coordinates as floating-point values, where each row represents a point record.

x1 y1 z1
x2 y2 z2
x3 y3 z3
x4 y4 z4
Note:
Point and multipoint features are written to the same file, whereas each polygon and polyline feature is written to a separate text file whose name is appended with the feature's ID. Each part of a multi-part feature is written to a separate file with its part number following the feature's ID in the file's name.

The GENERATE format does not support header lines, but it stores all input features in one file.

Point features are stored with their respective ID and XYZ coordinates, and the last line is denoted by the END keyword:
id1 x1 y1 z1
id2 x2 y2 z2
id3 x3 y3 z3
id4 x4 y4 z4END
Note:
Multipoint features that originate from the same record in the originating feature class will share the same ID.

Line and polygon features are separated by the END keyword, and two successive END keywords indicate the end of the file:
id1
x1 y1 z1
x2 y2 z2
x3 y3 z3
x4 y4 z4
END

id2
x1 y1 z1
x2 y2 z2
END

END
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