geojson-toolkit[alpha]

an interactive cli/library toolkit to interact with geojson via cli, primary for optimization, mapbox-prefer format

rationale

• reduce size 50% by removing precision from 15 to 6 in some polygon geojson.
• remove/split properties that are not used.
• add index property to each feature for mapbox-prefer format. reduce frontend processing time.

MVP concept

given a geojson file, the toolkit will create a set of geojson combined a set of operations.

given input.geojson

operation	description	file_example_name
reduce precision	reduce the precision of coordinates	input.p6e2.geojson
split properties	split properties that are not used.	input.p6e2.geojson, input.p6e2.properties.geojson
add index	add index property to each feature	input.p6e2.geojson

Usage

npm i -g @codustry/geojson-toolkit

geojson-toolkit [options] <geojson>

# example
geojson-toolkit input.geojson

# remove all existings
fd 'p\de\d' -x rm

# apply to all geojson files in a directory
fd -e geojson -x geojson-toolkit 

# compress all geojson files in a directory
fd . -t file  -x gzip -9 -k 

Arguments

• geojson: GeoJSON input file.

Options

Option	Description	Default Value
-p, --precision <precision>	Set the precision of coordinates.(default is 6 precision or ~10 cm)	6
-e, --extraPrecision <precision>	Set the extra precision for things like the z value when the coordinate is [longitude, latitude, elevation]. (default is 2 precisions ~ 1 cm if in meter unit.)	2
-P, --propertySplit	Split properties to properties file and remove properties from geojson	true
-i, --noIndex	add index to properties and geom file for flutter mapbox SDK. Default is true.	true
-V, --version	Output the version number
-h, --help	Display help for command

other tools

• geojson-precision - a cli tool to reduce the precision of coordinates in a geojson file. npm, 6yrs old last commit
• geojson-pick - a cli tool to pick properties from a geojson file. npm, 10yrs old last commit