Comments (2)
from eviltransform.
Neither OSM or your path data are that precise. OSM people trace data from their GPS devices and from satellite maps. These sky-based images do not always align perfectly with the coordinates they are referencing, especially when on uneven terrain found in chongqing when it becomes impossible as they are often not captured from the zenith (90° overhead).
You are dealing with street map data, not precision drone strikes. Being off by 500 meters is definitely wrong, but being off by 10 meters is probably not worth complaining about since streets can be that wide too. Feel free to improve OSM if you feel that you are absolutely right. Remember to map the center lines of streets and make sure your GPS is reporting a HDOP better than the current OSM result.
and no, the problem with eviltransform's gcj in #44 does not account for the difference. taking an example point in chongqing as a representative:
w (29.55833333, 106.56666667)
g_prc (29.55544346, 106.57036277)
g_evt (29.55545751, 106.57036283)
the distance between the two results is only 1.56 meters. Even with the non-precise reverse mode, the round-trip error is only 0.74 meters.
from eviltransform.
Related Issues (20)
- WGS84 or WSG84? HOT 4
- Mix-up in test data (and algorithm). HOT 2
- Wrong earth radius (ellipsoid semi-major axis) used in distance HOT 3
- wgtochina_lb and gpsHeight
- publish new npm module to fix wrong main config HOT 2
- test
- javascript typo HOT 1
- wgs2gcj 代码注释上的建议 HOT 1
- BD 算法偏移系数有误 HOT 7
- #28 半径的跟进 HOT 2
- outOfChina 或许可以裁掉南海(地图输入原因)
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- [question]integrate with pyproj HOT 4
- 有没有使用教程 HOT 1
- 考虑将repo转移到一个单独的project下面 HOT 5
- Phillipines not seen as out of China HOT 1
- [bug] wrong sign causing divergence in javascript HOT 1
- 对于原理的探讨 HOT 3
- 请问小白如何使用这个代码
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from eviltransform.