Strange Shapes Generated #129
Description
Firstly, this is a great set of data that I'm happy to have access to - thank you.
I've been validating some of the data and have seen some strange polygons created and wanted to know what the root cause of this is (whether I'm doing something wrong, etc)
Take for example the Lee Valley Velo Park in the London Olympic Village
QuadKey
031313131
GeoJSON
{"type": "Feature", "properties": { "height": 13.368171691894531, "confidence": -1.0},"geometry": {"type": "Polygon","coordinates": [[[-0.0157944811891353, 51.5498873613391], [-0.0150260252882228, 51.54981204486004], [-0.01432737688843, 51.55010193634923], [-0.0142696764511419, 51.55032957855235], [-0.0143002375035706, 51.550471440745774], [-0.014356194905103, 51.55047692506388], [-0.0143442665252391, 51.55048187447204], [-0.014487055323984, 51.55046997412536], [-0.0144380864679139, 51.55053708350929], [-0.0144016262879187, 51.550503106682434], [-0.0143764661721479, 51.550513546289885], [-0.0143894566669678, 51.550517212058246], [-0.0142963400004903, 51.55052496855504], [-0.0146877720281213, 51.55088973810615], [-0.0147126724344382, 51.55087940634456], [-0.0147352944973411, 51.55098441509665], [-0.015145624364965, 51.551024630568165], [-0.0154314963522073, 51.551000818062036], [-0.0154610816810541, 51.55088415044336], [-0.0155460087835846, 51.55087707248641], [-0.015393999752602, 51.5508621743923], [-0.0154913992232708, 51.5508540612036], [-0.0152974538954131, 51.55079934087585], [-0.0157401026437887, 51.55084272402034], [-0.0157342952068773, 51.55081576657256], [-0.0158801282427845, 51.55075525689982], [-0.0158274894931654, 51.55074040521631], [-0.0158615216231595, 51.55072628444183], [-0.0159005322309236, 51.55076263780404], [-0.0162377862542717, 51.55030051949016], [-0.0157944811891353, 51.5498873613391]]]}}
However, this yields
Also, in other more simple shapes, the polygon regularly seems off-center, e.g. the following GeoJSON from the same quadkey
{"type": "Feature", "properties": { "height": 7.860638618469238, "confidence": -1.0},"geometry": {"type": "Polygon","coordinates": [[[-0.0274372725260852, 51.5481362747604], [-0.0272214088040679, 51.547928701888935], [-0.0268442539518987, 51.54808039258931], [-0.027034435718174, 51.54826324954267], [-0.027223555193634, 51.5481871947816], [-0.0272492415839887, 51.54821189185068], [-0.0274372725260852, 51.5481362747604]]]}}
Yields
Any help would be appreciated, thanks in advance