node-red-contrib-tak-registration
Version:
A Node-RED node to register to TAK and to help wrap files as datapackages to send to TAK
32 lines (23 loc) • 910 B
JavaScript
import {default as geoStream} from "../stream";
import boundsStream from "../path/bounds";
export function fitExtent(projection, extent, object) {
var w = extent[1][0] - extent[0][0],
h = extent[1][1] - extent[0][1],
clip = projection.clipExtent && projection.clipExtent();
projection
.scale(150)
.translate([0, 0]);
if (clip != null) projection.clipExtent(null);
geoStream(object, projection.stream(boundsStream));
var b = boundsStream.result(),
k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
if (clip != null) projection.clipExtent(clip);
return projection
.scale(k * 150)
.translate([x, y]);
}
export function fitSize(projection, size, object) {
return fitExtent(projection, [[0, 0], size], object);
}