aneka-spatial

ES6 geospatial functions for daily life

Installation

$ npm install aneka-spatial

Usage

import { isValidCoord } from 'aneka-spatial/index.js'

const longitude = 200
const latitude = 100
const valid = isValidCoord(longitude, latitude)
console.log(valid) // false

Functions

angleIn90Deg (angle)

boundsToTiles (bounds, zoom, allTiles, withZ)

ddToDms (value, secPrecision)

Convert latitude/longitude in decimal degree to its string representation in degree, minute and second.

Parameter:

• value (float): value to convert to
• secPrecision (integer): number of digits after period in second (defaults to: 2)

Return: string

divideBounds (bounds, count)

Divide bounds into smaller pieces of bounds

Parameter:

• bounds (array of floats): bounds to divide
• count (integer): number of pieces (horizontally AND vertically)

Return: array of bounds

dmsToDd (value)

Parse string representation of a coordinate value in degree, minute, second into its decimal value

Parameter:

• value (string): dms value

Return: float

enlargeBounds (bounds, zoom)

Enlarge bounds at zoom level

Parameter:

• bounds (array): bounds to enlarge
• zoom (integer): zoom level

Return: array

getTileBounds (x, y, zoom)

getTileLocation ({ type, prefix = '', z, x, y, format = '.png' })

isCoordInBounds (lng, lat, bounds)

isValidCoord (lng, lat)

latSizeOf (value)

latToDms (val, secPrecision)

latToTile (lat, zoom)

lngSizeOf (value, lat)

lngToDms (val, secPrecision)

lngToTile (lng, zoom)

sanitizeBounds (bounds)

tileToLat (y, zoom)

tileToLng (x, zoom)

tilesToBounds (x1, y1, x2, y2, zoom, returnObject)

License

MIT