Earthdata Search Components: Geo Utils

edsc-geo is a utility library for working with spherical coordinates, polygons, and arcs in Javascript.

The edsc-geo plugin was developed as a component of Earthdata Search.

Installation

npm install @edsc/geo-utils

Usage

Available methods

| Method | Description | Input | Output | | :----: | ----------- | ----- | :----: | | dividePolygon | Given a list of latlngs constituting a polygon, returns an object: {interiors: [...], boundaries: [...]} | Array of latlngs | {interiors: [...], boundaries: [...]} | gcInterpolate | Given two points, returns their midpoint along the shortest great circle between them. The two points may not be antipodal, since such a midpoint would be undefined | Two points, objects with lat/lng keys | Object with lat/lng keys | getShape | Takes an array of lat/lng pairs and returns array of objects with lat/lng keys | Array of lat/lng pairs ['10,0','20,10'] | Array of objects with lat/lng keys [{ lat: 0, lng: 10 }, { lat: 10, lng: 20 }] | makeCounterClockwise | Ensures that latlngs is counterclockwise around its smallest area | Array of latlngs | Array of latlngs | mbr | Finds the minimum bounding rectangle of the provided spatial | Spatial object containing boundingBox, circle, point or polygon spatial | { swLat, swLng, neLat, neLng } | splitListOfPoints | Splits a string of points on every other comma | '10,0,20,10' | ['10,0','20,10']

Contributing

See CONTRIBUTING.md

License

Copyright © 2007-2014 United States Government as represented by the Administrator of the National Aeronautics and Space Administration. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.