spatiasql.js
JavaScript (emscripten) port of SpatiaLite 5.0.0-beta (including SQLite 3.24.0, proj 5.1.0, geos 3.6.2)
Demo
A demo (WebAssembly required) is available from here: http://jvail.github.io/spatiasql.js/
(be patient, loading the js and database file takes some time).
Usage
spatiasql.js (SpatiaLite) is an extension of sql.js (SQLite) and implements the same (for node), but async API for the browser, exept:
- loading shapefiles in node:
const fs = require('fs');
const spatiasql = require('spatiasql-node');
spatiasql.then(Database => {
const db = new Database();
db.loadshp('my_table', 'CP1251', 4326, {
shp: fs.readFileSync('my_file.shp'),
shx: fs.readFileSync('my_file.shx'),
dbf: fs.readFileSync('my_file.dbf')
});
let res = db.exec('SELECT * FROM my_table');
console.log(res);
});
- loading shapefiles in the browser:
import { Database } from 'spatiasql';
const db = new Database();
const files = await Promise.all([
fetch('my_file.shp').then(res => res.arrayBuffer()),
fetch('my_file.shx').then(res => res.arrayBuffer()),
fetch('my_file.dbf').then(res => res.arrayBuffer())
]);
const loaded = await db.loadshp('my_table', 'CP1251', 4326, {
shp: files[0],
shx: files[1],
dbf: files[2]
});
if (loaded) {
db.exec('SELECT * FROM my_table')
.then(res => console.log(res));
}
