Reading and Writing GCS Filesby Read Write Tools
|The gcsio CLI tool is for reading and writing Geographic Coordinate System encoded files. It serves as a GIS exchange format for points, lines, and polygons that use longitude/latitude coordinates.|
The creation of this library and CLI was motivated by the desire to create GIS shape files that can be downloaded by website visitors in a highly compressed format.
gcsio package is a command line utility wrapper for the
gcslib core library.
Supported input and output formats comprise:
- geojson - RFC 7946
- gfe - Geographic Feature Encoding
- ice - Indexed Coordinate Encoding
- tae - Topological Arc Encoding
- gfebin - Geographic Feature Encoding binary
- icebin - Indexed Coordinate Encoding binary
- taebin - Topological Arc Encoding binary
The CLI uses the node.js filesystem package to read and write files using the API's exported functions.
See also: The
gcslib core API parses and serializes to standard ECMAScript Strings and ArrayBuffers, with using the host computer's file system, so it can be used with client facing web pages that obtain data using HTTP.
The gcsio library may be installed directly from github or via NPM.
To install and run the CLI:
[user@host]# npm install -g gcsio
[user@host]# gcsio --help
GCSCIO | Geographic Coordinate System I/O: reading from and writing to files with longitude/latitude coordinates
usage: gcscio --input=filename --output=filename [options]
--input= filename to read from
--output= filename to write to
--iformat= input file format, optionally defaults to filename extension
--oformat= output file format, optionally defaults to filename extension
'geojson' RFC 7946
'gfe' Geographic Feature Encoding
'gfebin' Geographic Feature Encoding binary
'ice' Indexed Coordinate Encoding
'icebin' Indexed Coordinate Encoding binary
'tae' Topological Arc Encoding
'taebin' Topological Arc Encoding binary
--accuracy= digits to use for latitude and longitude coordinates 1 to 6 (1=11km, 2=1100m, 3=110m, 4=11m, 5=1.1m, 6=11cm)
--dataset-id= identifier for the collection of points, lines or polygons
--properties which properties to include with each feature
a comma-separated list of property names, or the keyword 'none' or 'all'†
--declarations the name of a file which contains declarations of property names and property types
where each line is in the form "name=type"
Valid types are:
tinyInt, tinyUint, tinyInt, tinyUint
shortInt, shortUint, shortInt, shortUint
longInt, longUint, longInt, longUint
This library depends on iolib and softlib.
|node.js||CLI and API|
|Documentation||Read Write Hub|
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