XYZ2DEM Importer - Notes on Input Text File Formats

XYZ2DEM Importer - Notes on Input Text File Formats

XYZ2DEM Importer accepts several delimiters and notations of comments. An example shows common possibilities.

Preliminaries:

Download and install XYZ2DEM Importer.

Download input data: five_points_without_comments.txt and five_points_with_comments.txt.

Examples: This ImageJ plugin imports X,Y,Z coordinates of (usually irregularly distributed) points from the first 3 columns of a plain text file. Usually the text file looks someway like the example five_points_without_comments.txt:

    9.600   29.600 4000.000    17.600 2.96e+01 2100.000    17.600 0037.600 1600.000     9.600   37.600 8600.000    13.300   33.300 9999.999

The text parser also accepts different separation characters like colons or commas. Several single-line comments are supported; find out more by studying the example five_points_with_comments.txt below, which leads to the same DEM image as the example above:

// This is a single line comment #  This is a single line comment #  Empty lines will be ignored! #  The following line will be accepted:     9.600  /* this is a comment */  29.600 4000.000 #  Scientific notation will be accepted:    17.600 2.96e+01 2100.000 #  More than three numbers in one line will be ignored:    17.600 0037.600 1600.000  22.2  3.5 #  The following line will be accepted: 9.6;37.6  ,        8600.000 #  The following line will be ignored because #  the third coordinate is missing:    12.600   47.600 #  ONE of the following lines will be ignored #  because X and Y of both points are equal; #  please check the displayed numbers of #  accepted and eliminated points:    13.300   33.300 9111.111    13.300   33.300 9999.999

It is not recommended to use Java-style multi-line comments, though simple Java-style multi-line comments are supported; nesting single line comments within multi-line comments might yield to unexpected results, please be careful.

Import: Import five_points_without_comments.txt:
Plugins > XYZ2DEM Importer: five_points_without_comments.txt
using the following set of input parameters:
Length of one pixel: 0.1
Maximum edge length: 0.0
Background value:     1600.0

This leads to the resulting DEM image:

Import five_points_with_comments.txt:
Plugins > XYZ2DEM Importer: five_points_with_comments.txt
using the same set of input parameters as above.
Now the parameter window indicates that one points was eliminated:

The resulting DEM image should be the same as the one above.

XYZ2DEM Importer - Notes on Input Text File Formats XYZ2DEM Importer accepts several delimiters and notations of comments. An example shows common possibilities.
Preliminaries:	Download and install XYZ2DEM Importer. Download input data: five_points_without_comments.txt and five_points_with_comments.txt.
Examples:	This ImageJ plugin imports X,Y,Z coordinates of (usually irregularly distributed) points from the first 3 columns of a plain text file. Usually the text file looks someway like the example five_points_without_comments.txt: `9.600 29.600 4000.000 17.600 2.96e+01 2100.000 17.600 0037.600 1600.000 9.600 37.600 8600.000 13.300 33.300 9999.999` The text parser also accepts different separation characters like colons or commas. Several single-line comments are supported; find out more by studying the example five_points_with_comments.txt below, which leads to the same DEM image as the example above: // This is a single line comment # This is a single line comment # Empty lines will be ignored! # The following line will be accepted: 9.600 /* this is a comment */ 29.600 4000.000 # Scientific notation will be accepted: 17.600 2.96e+01 2100.000 # More than three numbers in one line will be ignored: 17.600 0037.600 1600.000 22.2 3.5 # The following line will be accepted: 9.6;37.6 , 8600.000 # The following line will be ignored because # the third coordinate is missing: 12.600 47.600 # ONE of the following lines will be ignored # because X and Y of both points are equal; # please check the displayed numbers of # accepted and eliminated points: 13.300 33.300 9111.111 13.300 33.300 9999.999 It is not recommended to use Java-style multi-line comments, though simple Java-style multi-line comments are supported; nesting single line comments within multi-line comments might yield to unexpected results, please be careful.
Import:	Import five_points_without_comments.txt: `Plugins > XYZ2DEM Importer: five_points_without_comments.txt` using the following set of input parameters: `Length of one pixel: 0.1` `Maximum edge length: 0.0` `Background value: 1600.0` This leads to the resulting DEM image: Import five_points_with_comments.txt: `Plugins > XYZ2DEM Importer: five_points_with_comments.txt` using the same set of input parameters as above. Now the parameter window indicates that one points was eliminated: The resulting DEM image should be the same as the one above.