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PROGRAM:

NAME


rl2sniff - Sniffer tool for RasterLite2

SYNOPSIS


rl2sniff [ARGLIST]

DESCRIPTION


rl2sniff is a sniffer tool for RasterLite2. Sometimes handling a relevant number of
raster images (may be of different origin and presenting different technical
characteristics) isn't an easy task, most notably when your images are dispersed into many
different folders. The rl2sniff CLI tool is exactly intended to offer a significant help
in organizing and planning any preliminary activity required in order to create and
populate your RasterLite2's Coverages.

rl2sniff will examine files containing a raster image, and will then create a report
showing the more relevant characteristics for each one; the supported arguments are the
followings:

· arguments specifying the intended target:

· -src pathname: will examine just a single input raster image.

· -dir pathname: will explore a whole directory aka folder.

· Please note: -src and -dir are mutually exclusive options.

· -ext extension: combined with -dir will restrict the search to a specific raster
format.

· if no target is explicitly selected (e.g. when there are no arguments at all) then the
current working directory will be intended by default.

· -wf: any georeferencing information will be always retrieved from a companion worldfile
http://en.wikipedia.org/wiki/World_file⟩ .

Please note: in this case any georeferencing found in the worldfile will always override
any other information eventually found e.g. within a GeoTIFF image.

· -md5: the output report will include an MD5 checksum ⟨http://en.wikipedia.org/wiki/MD5
computed for each raster file.

Please note: computing the MD5 checksums could require a substantial amount of time,
most notably when many hundredth huge-sized files are to be scanned.

the output report. The report created by rl2sniff simply corresponds to a TXT/TAB being
printed on the stdout file. The report's columns are as follows:

· columns always supported for both georeferenced and non-georeferenced rasters:

· image_format: e.g. GeoTIFF, TIFF+TFW or ASCII Grid.

· MD5_checksum: may be NULL is the corresponding option wasn't activated.

· image_path: the absolute path leading to the raster file.

· width and height: horizontal and vertical dimensions (in pixels).

· sample_type, pixel_type and bands: e.g. UINT8, RGB, 3.

· no_data: value corresponding to NO-DATA pixels (currently supported only for ASCII
Grids).

· compression: e.g. DEFLATE or FAX4; NONE if uncompressed.

· columns supported only for raster of the georeferenced type:

· srid: the declared SRID value; -1 if unknown / unspecified.

· x_resolution and y_resolution: horizontal and vertical pixel resolution.

· min_x, min_y, max_x and max_y: extreme points of the raster's bounding box aka BBOX.

OPTIONS


-h, --help
print usage information

-src pathname, --src-path pathname
single Image/Raster path

-dir pathname, --dir-path pathname
directory path

-ext extension, --file-ext extension
file extension (e.g. .tif)

-wf, --worldfile
requires a Worldfile

-md5, --md5-checksum
enabling MD5 checksums

27 October 2015 rl2sniff(1)

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