Too much simplification when loading existing polygons

[Dahkon]

Hello,

I try to load existing polygons to edit. But the points are getting too much simplification so instead of approximates circles, I get approximate hexagons (sort of). Modifying options dit not change a thing.

Here is initialisation for now (tryed 0 for both smooth and simplify). new FreeDraw({ mode: FreeDraw.NONE, elbowDistance:5, smoothFactor:0.5, simplifyFactor:0.2 });

Maybe the problem comes from my projection (crs)

L.CRS.Direct = L.extend({}, L.CRS, {
		projection: L.Projection.LonLat,
		transformation: new L.Transformation(1, 0, -1, 0),
		scale: function (zoom) {
			return Math.pow(1.5, zoom);
		}
	});
L.Map.canvasSize=[[-800,-800], [800,800]];

var optionsLeafLet = {
			maxBounds : L.Map.canvasSize,
			crs: L.CRS.Direct
}

And the polygon (a sort of ellipse) [[[{"lat":262.63878827791,"lng":85.825485676655},{"lat":262.34985182746,"lng":85.821534408956},{"lat":262.06140928548,"lng":85.807704972012},{"lat":261.77444846888,"lng":85.785972999671},{"lat":261.48798156075,"lng":85.756338491933},{"lat":261.20250246954,"lng":85.717813631874},{"lat":260.91801119526,"lng":85.670398419493},{"lat":260.63500164636,"lng":85.615080671716},{"lat":260.35248600593,"lng":85.550872571617},{"lat":260.07095818242,"lng":85.478761936121},{"lat":259.79091208429,"lng":85.397760948304},{"lat":259.51135989463,"lng":85.309845242015},{"lat":259.23378333882,"lng":85.21205136648},{"lat":258.95670069147,"lng":85.106354955548},{"lat":258.68060586105,"lng":84.993743826144},{"lat":258.40599275601,"lng":84.872242344419},{"lat":258.1323674679,"lng":84.742838327297},{"lat":257.85972999671,"lng":84.605531774778},{"lat":257.58857425091,"lng":84.461310503787},{"lat":257.31840632203,"lng":84.308198880474},{"lat":257.050214027,"lng":84.148172538689},{"lat":256.7830095489,"lng":83.980243661508},{"lat":256.51728679618,"lng":83.80441224893},{"lat":256.25255186039,"lng":83.620678300955},{"lat":255.98929864998,"lng":83.430029634508},{"lat":255.7270332565,"lng":83.231478432664},{"lat":255.46674349687,"lng":83.026012512348},{"lat":255.20793546263,"lng":82.812644056635},{"lat":254.95011524531,"lng":82.59236088245},{"lat":254.69377675338,"lng":82.365162989793},{"lat":254.43941389529,"lng":82.130062561739},{"lat":254.18603885413,"lng":81.888047415212},{"lat":253.93463944682,"lng":81.639117550214},{"lat":253.6847217649,"lng":81.383272966744},{"lat":253.43628580836,"lng":81.119525847876},{"lat":253.18933157721,"lng":80.849851827461},{"lat":252.94385907145,"lng":80.57227527165},{"lat":252.70036219954,"lng":80.28877181429},{"lat":252.45834705301,"lng":79.997365821534},{"lat":252.21830754034,"lng":79.700032927231},{"lat":251.97974975305,"lng":79.395785314455},{"lat":251.7431675996,"lng":79.085610800132},{"lat":251.50806717155,"lng":78.767533750412},{"lat":251.27494237735,"lng":78.443529799144},{"lat":251.04329930853,"lng":78.113598946329},{"lat":250.81363187356,"lng":77.776753375041},{"lat":250.58594007244,"lng":77.432993085282},{"lat":250.35972999671,"lng":77.083305893974},{"lat":250.13598946329,"lng":76.72769180112},{"lat":249.91373065525,"lng":76.365162989793},{"lat":249.69394138953,"lng":75.996707276918},{"lat":249.47563384919,"lng":75.622324662496},{"lat":249.25930194271,"lng":75.242015146526},{"lat":249.04494567007,"lng":74.854790912084},{"lat":248.83305893974,"lng":74.462627593019},{"lat":248.6226539348,"lng":74.064537372407},{"lat":248.41471847218,"lng":73.660520250247},{"lat":248.2087586434,"lng":73.250576226539},{"lat":248.00477444847,"lng":72.834705301284},{"lat":247.80276588739,"lng":72.412907474481},{"lat":247.60322686862,"lng":71.986170563056},{"lat":247.4056634837,"lng":71.553506750082},{"lat":247.21056964109,"lng":71.114916035561},{"lat":247.01745143233,"lng":70.671386236418},{"lat":246.82680276589,"lng":70.221929535726},{"lat":246.63812973329,"lng":69.767533750412},{"lat":246.451926243,"lng":69.30721106355},{"lat":246.26769838657,"lng":68.841949292065},{"lat":246.0864339809,"lng":68.371748435957},{"lat":245.90714520909,"lng":67.896608495226},{"lat":245.73032597959,"lng":67.415541652947},{"lat":245.55597629239,"lng":66.929535726045},{"lat":245.38360223905,"lng":66.438590714521},{"lat":245.21419163648,"lng":65.942706618373},{"lat":245.04675666776,"lng":65.441883437603},{"lat":244.88228514982,"lng":64.937108989134},{"lat":244.71978926572,"lng":64.426407639118},{"lat":244.5602568324,"lng":63.910767204478},{"lat":244.40319394139,"lng":63.39117550214},{"lat":244.24860059269,"lng":62.866644715179},{"lat":244.0964767863,"lng":62.337174843596},{"lat":243.94682252223,"lng":61.803753704313},{"lat":243.80013170892,"lng":61.265393480408},{"lat":243.65591043793,"lng":60.723081988805},{"lat":243.51465261771,"lng":60.175831412578},{"lat":243.37586433981,"lng":59.624629568653},{"lat":243.24003951268,"lng":59.06947645703},{"lat":243.10668422786,"lng":58.509384260784},{"lat":242.97629239381,"lng":57.945340796839},{"lat":242.84886401054,"lng":57.377346065196},{"lat":242.72390516958,"lng":56.805400065854},{"lat":242.60190977939,"lng":56.22851498189},{"lat":242.48238393151,"lng":55.648666447152},{"lat":242.36582153441,"lng":55.063878827791},{"lat":242.25271649654,"lng":54.476127757656},{"lat":242.14257490945,"lng":53.884425419822},{"lat":242.03490286467,"lng":53.28877181429},{"lat":241.93019427066,"lng":52.68916694106},{"lat":241.82844912743,"lng":52.086598617056},{"lat":241.72966743497,"lng":51.480079025354},{"lat":241.63434310175,"lng":50.869608165953},{"lat":241.5419822193,"lng":50.256173855779},{"lat":241.45258478762,"lng":49.638788277906},{"lat":241.36615080672,"lng":49.018439249259},{"lat":241.28268027659,"lng":48.394138952914},{"lat":241.20217319723,"lng":47.766875205795},{"lat":241.12561738558,"lng":47.136648007903},{"lat":241.0520250247,"lng":46.503457359236},{"lat":240.98139611459,"lng":45.866315442871},{"lat":240.9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Any suggestion to bypass the simplification or something ? Thanks,

[rsquizz]

I'm having a similar issue!

[sbraaa]

The same for me, anyone found a solution?

[ventralnet]

+1

[roberts-g]

I have also been having this issue, so I decided to do a bit of digging.

It appears that that the function latLngsToClipperPoints, or specifically, latLngToLayerPoint, is the root of the problem.

The LatLngs that are passed in are: "LatLng(84.99073, -179.53296),LatLng(84.99073, -179.53272),LatLng(84.99074, -179.53248),LatLng(84.99075, -179.53237),LatLng(84.99076, -179.53228),LatLng(84.99086, -179.53192),LatLng(84.99098, -179.53092),LatLng(84.99105, -179.53001),LatLng(84.99108, -179.52945),LatLng(84.99109, -179.52937),LatLng(84.99115, -179.52896),LatLng(84.99118, -179.52889),LatLng(84.9912, -179.5289),LatLng(84.99122, -179.52899),LatLng(84.99123, -179.52917),LatLng(84.99124, -179.52955),LatLng(84.99124, -179.52989),LatLng(84.99123, -179.53038),LatLng(84.99121, -179.53059),LatLng(84.99114, -179.53212),LatLng(84.99117, -179.53236),LatLng(84.99118, -179.53253),LatLng(84.9912, -179.53282),LatLng(84.99121, -179.53338),LatLng(84.99122, -179.53427),LatLng(84.99122, -179.53474),LatLng(84.9912, -179.53514),LatLng(84.99116, -179.53677),LatLng(84.99113, -179.53761),LatLng(84.99109, -179.53812),LatLng(84.99107, -179.53836),LatLng(84.99104, -179.53839),LatLng(84.99101, -179.53833),LatLng(84.99099, -179.53815),LatLng(84.99097, -179.53791),LatLng(84.99095, -179.5373),LatLng(84.99094, -179.53639),LatLng(84.99094, -179.53585),LatLng(84.99094, -179.53518),LatLng(84.99085, -179.53376),LatLng(84.99076, -179.53354),LatLng(84.99075, -179.53346),LatLng(84.99074, -179.53316),LatLng(84.99073, -179.53296)"

whilst the ClipperPoints returned are: {X:968, Y:375},{X:968, Y:375},{X:968, Y:375},{X:968, Y:375},{X:968, Y:375},{X:968, Y:375},{X:969, Y:374},{X:969, Y:374},{X:969, Y:374},{X:969, Y:374},{X:970, Y:374},{X:970, Y:373},{X:970, Y:373},{X:969, Y:373},{X:969, Y:373},{X:969, Y:373},{X:969, Y:373},{X:969, Y:373},{X:969, Y:373},{X:968, Y:374},{X:968, Y:374},{X:968, Y:373},{X:968, Y:373},{X:968, Y:373},{X:968, Y:373},{X:967, Y:373},{X:967, Y:373},{X:967, Y:374},{X:966, Y:374},{X:966, Y:374},{X:966, Y:374},{X:966, Y:374},{X:966, Y:374},{X:966, Y:374},{X:966, Y:374},{X:966, Y:374},{X:967, Y:375},{X:967, Y:375},{X:967, Y:374},{X:968, Y:375},{X:968, Y:375},{X:968, Y:375},{X:968, Y:375},{X:968, Y:375}

As you can see, a lot of the LatLngs are being mapped to the same ClipperPoint, resulting in the simplification.

Unfortunately, I do not know where to go from here with regards to solving this issue, but hopefully this will be able to help someone a bit more knowledgeable!

[r2my]

+1 Similar issue. I tried to disabled the simplification but it doesn't work... Thanks for your help!

[AndreasOlausson]

We have the same problem but this is a Leaflet Issue (https://github.com/Leaflet/Leaflet/issues/6177)

What you can do to make the result a bit better: (Psuedo code) const currentZoomLevel = map.getZoom(); map.setZoom(MAX_ZOOM_LEVEL); use freedraw to write the polygon(s)... map.setZoom(currentZoomLevel);

And yes, @roberts-g is right "latLngToLayerPoint" is the problem. You can also try something like this:

onMapReady():void{ this.map.latLngToLayerPoint = function (latlng) { var projectedPoint = this.project(toLatLng(latlng)); return projectedPoint._subtract(this.getPixelOrigin()); }; };