postgis2geojson
/
0.2.1
postgis2geojson 0.2.1
Install from the command line:
Learn more about npm packages
$ npm install @watergis/postgis2geojson@0.2.1
Install via package.json:
"@watergis/postgis2geojson": "0.2.1"
About this version
This module is to extract GeoJSON files by SQL from PostGIS database.
npm install @watergis/postgis2geojson
const {postgis2geojson} = require('@watergis/postgis2geojson');
const config = require('./config');
const pg2json = new postgis2geojson(config);
pg2json.run().then(res=>{
console.log(res);
}).catch(err=>{
console.log(err);
})
config.js
module.exports = {
db: {
user:process.env.DB_USER,
password:process.env.DB_PASSWORD,
host:process.env.DB_HOST,
port:process.env.DB_PORT,
database:'narwassco',
},
layers : [
{
name: 'pipeline',
geojsonFileName: export_dir + '/pipeline.geojson',
select: `
SELECT row_to_json(featurecollection) AS json FROM (
SELECT
'FeatureCollection' AS type,
array_to_json(array_agg(feature)) AS features
FROM (
SELECT
'Feature' AS type,
ST_AsGeoJSON(ST_TRANSFORM(ST_MakeValid(x.geom),4326))::json AS geometry,
row_to_json((
SELECT p FROM (
SELECT
x.pipeid as fid,
a.name as pipetype,
x.pipesize,
b.name as material,
x.constructiondate,
x.insertdate,
x.updatedate,
x."Town"
) AS p
)) AS properties
FROM pipenet x
INNER JOIN pipetype a
ON x.pipetypeid = a.pipetypeid
INNER JOIN material b
ON x.materialid = b.materialid
WHERE NOT ST_IsEmpty(x.geom)
) AS feature
) AS featurecollection
`
},
]
}
See the test module under test
directory.
npm run build
npm run test