esoko/mapguesser
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radius calculation for new panorama search based on latitude and mercator projection for google maps #36

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balazs merged 1 commits from feature/more-accurate-new-selection-in-mapeditor-on-google-maps into develop 2021-05-02 18:02:29 +02:00
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1 changed files with 20 additions and 2 deletions
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public/static/js/map_editor.js
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@ -86,7 +86,7 @@
sv.getPanorama({ sv.getPanorama({
location: location, location: location,
preference: google.maps.StreetViewPreference.NEAREST, preference: google.maps.StreetViewPreference.NEAREST,
radius: 100, radius: MapEditor.map.getSearchRadius(location),
source: canBeIndoor ? google.maps.StreetViewSource.DEFAULT : google.maps.StreetViewSource.OUTDOOR source: canBeIndoor ? google.maps.StreetViewSource.DEFAULT : google.maps.StreetViewSource.OUTDOOR
}, function (data, status) { }, function (data, status) {
var panoLocationData = status === google.maps.StreetViewStatus.OK ? data.location : null; var panoLocationData = status === google.maps.StreetViewStatus.OK ? data.location : null;
@ -473,7 +473,11 @@
LMapWrapper.markers.removeLayer(marker); LMapWrapper.markers.removeLayer(marker);
}, },
toggleStreetViewCover: function () { } toggleStreetViewCover: function () { },
getSearchRadius: function (location) {
return 100;
}
}; };
var GMapWrapper = { var GMapWrapper = {
@ -626,6 +630,20 @@
GMapWrapper.streetViewCover.setMap(GMapWrapper.map); GMapWrapper.streetViewCover.setMap(GMapWrapper.map);
GMapWrapper.streetViewCoverOn = true; GMapWrapper.streetViewCoverOn = true;
} }
},
getSearchRadius: function (location) {
// source: https://www.yorku.ca/mack/CHI01.htm
var movementOffset = 4;
// source: https://groups.google.com/g/google-maps-js-api-v3/c/hDRO4oHVSeM/m/osOYQYXg2oUJ?pli=1
var metersPerPixel = 156543.03392 * Math.cos(location.lat * Math.PI / 180) / Math.pow(2, GMapWrapper.map.getZoom());
var minSearchRadius = 5;
var searchRadius = Math.max(minSearchRadius, Math.round(movementOffset * metersPerPixel));
return searchRadius;
} }
}; };