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Центровка карты
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@mkgrgis
mkgrgis committed Mar 15, 2024
1 parent 14e01a3 commit 8192a5d
Showing 1 changed file with 192 additions and 3 deletions.
195 changes: 192 additions & 3 deletions explication.js
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Original file line number Diff line number Diff line change
Expand Up @@ -91,10 +91,11 @@ L.OSM.park_explication = function(osm_obj_type, osm_obj_id, f_fin_ok){
};

L.OSM.park_explication.prototype.map = function (div, map_prov, map_params) {
var cen = this.geoJsonGeneral.features[0].geometry.coordinates[0][0];
var mrg = this.general_rel_geoJson(this.geoJsonGeneral);
var cen = turf_centroid(mrg);
var md = new mapDiv(
div,
[cen[1], cen[0]],
cen,
map_prov.tileLayers,
map_prov.Names,
{
Expand All @@ -105,7 +106,7 @@ L.OSM.park_explication = function(osm_obj_type, osm_obj_id, f_fin_ok){
true,
map_params
);
var mrg = this.general_rel_geoJson(this.geoJsonGeneral);

var n = mrg.properties.tags.name;
var mr = L.geoJSON(mrg, { fillOpacity: 0, color: "#F2872F" });
md.map.fitBounds(mr.getBounds());
Expand Down Expand Up @@ -635,3 +636,191 @@ L.OSM.park_explication.prototype.привязка_указателей = functio
o.webData.Тип_информации = '<span style="color: green">' + п + '</span>';
}
};

function turf_centroid(geojson) {
var xSum = 0;
var ySum = 0;
var len = 0;
turf_coordEach(geojson, function (coord) {
xSum += coord[0];
ySum += coord[1];
len++;
}, true);
return [ySum / len, xSum / len];
}

/**
* Iterate over coordinates in any GeoJSON object, similar to Array.forEach()
*
* @name coordEach
* @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
* @param {Function} callback a method that takes (currentCoord, coordIndex, featureIndex, multiFeatureIndex)
* @param {boolean} [excludeWrapCoord=false] whether or not to include the final coordinate of LinearRings that wraps the ring in its iteration.
* @returns {void}
* @example
* var features = turf.featureCollection([
* turf.point([26, 37], {"foo": "bar"}),
* turf.point([36, 53], {"hello": "world"})
* ]);
*
* turf.coordEach(features, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
* //=currentCoord
* //=coordIndex
* //=featureIndex
* //=multiFeatureIndex
* //=geometryIndex
* });
*/
function turf_coordEach(geojson, callback, excludeWrapCoord) {
// Handles null Geometry -- Skips this GeoJSON
if (geojson === null) return;
var j,
k,
l,
geometry,
stopG,
coords,
geometryMaybeCollection,
wrapShrink = 0,
coordIndex = 0,
isGeometryCollection,
type = geojson.type,
isFeatureCollection = type === "FeatureCollection",
isFeature = type === "Feature",
stop = isFeatureCollection ? geojson.features.length : 1;

// This logic may look a little weird. The reason why it is that way
// is because it's trying to be fast. GeoJSON supports multiple kinds
// of objects at its root: FeatureCollection, Features, Geometries.
// This function has the responsibility of handling all of them, and that
// means that some of the `for` loops you see below actually just don't apply
// to certain inputs. For instance, if you give this just a
// Point geometry, then both loops are short-circuited and all we do
// is gradually rename the input until it's called 'geometry'.
//
// This also aims to allocate as few resources as possible: just a
// few numbers and booleans, rather than any temporary arrays as would
// be required with the normalization approach.
for (var featureIndex = 0; featureIndex < stop; featureIndex++) {
geometryMaybeCollection = isFeatureCollection
? geojson.features[featureIndex].geometry
: isFeature
? geojson.geometry
: geojson;
isGeometryCollection = geometryMaybeCollection
? geometryMaybeCollection.type === "GeometryCollection"
: false;
stopG = isGeometryCollection
? geometryMaybeCollection.geometries.length
: 1;

for (var geomIndex = 0; geomIndex < stopG; geomIndex++) {
var multiFeatureIndex = 0;
var geometryIndex = 0;
geometry = isGeometryCollection
? geometryMaybeCollection.geometries[geomIndex]
: geometryMaybeCollection;

// Handles null Geometry -- Skips this geometry
if (geometry === null) continue;
coords = geometry.coordinates;
var geomType = geometry.type;

wrapShrink =
excludeWrapCoord &&
(geomType === "Polygon" || geomType === "MultiPolygon")
? 1
: 0;

switch (geomType) {
case null:
break;
case "Point":
if (
callback(
coords,
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
return false;
coordIndex++;
multiFeatureIndex++;
break;
case "LineString":
case "MultiPoint":
for (j = 0; j < coords.length; j++) {
if (
callback(
coords[j],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
return false;
coordIndex++;
if (geomType === "MultiPoint") multiFeatureIndex++;
}
if (geomType === "LineString") multiFeatureIndex++;
break;
case "Polygon":
case "MultiLineString":
for (j = 0; j < coords.length; j++) {
for (k = 0; k < coords[j].length - wrapShrink; k++) {
if (
callback(
coords[j][k],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
return false;
coordIndex++;
}
if (geomType === "MultiLineString") multiFeatureIndex++;
if (geomType === "Polygon") geometryIndex++;
}
if (geomType === "Polygon") multiFeatureIndex++;
break;
case "MultiPolygon":
for (j = 0; j < coords.length; j++) {
geometryIndex = 0;
for (k = 0; k < coords[j].length; k++) {
for (l = 0; l < coords[j][k].length - wrapShrink; l++) {
if (
callback(
coords[j][k][l],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
return false;
coordIndex++;
}
geometryIndex++;
}
multiFeatureIndex++;
}
break;
case "GeometryCollection":
for (j = 0; j < geometry.geometries.length; j++)
if (
coordEach(geometry.geometries[j], callback, excludeWrapCoord) ===
false
)
return false;
break;
default:
throw new Error("Unknown Geometry Type");
}
}
}
}

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