Comments (16)
您好,我通过上面的文档发布了一个高程服务,通过mapbox引入,但是这块高程区域比其他图层高出一块来是怎么回事,能解答一下么
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@chenchaoqdu 主要和你的栅格数据有关, 有几个可能出问题的地方:
- 栅格数据的 0 值是多少;
- 栅格数据的分辨率和它的缩放不匹配,也可能导致这样的问题;
- 这种 rgb 格式的高层, 精确度不高(分米级),需要对栅格数据进行差值,尽量适配;
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谢谢解答,我再找一下原因
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@chenchaoqdu 我也遇到了相同的问题,请问问题原因是什么,解决了吗?感谢~
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@chenchaoqdu 请问解决了吗, 我也遇到类似问题,高程区域边界有明显的楞线
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@chenchaoqdu @undefinedGIS @Sun404 能否将 dem 的 rio info
结果贴出来看看?
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{"blockxsize": 256, "blockysize": 256, "bounds": [13303711.89897836, 4242401.635796383, 13476483.548124677, 4459833.289155098], "colorinterp": ["gray"], "compress": "deflate", "count": 1, "crs": "EPSG:3857", "descriptions": [null], "driver": "GTiff", "dtype": "float32", "height": 5039, "indexes": [1], "interleave": "band", "lnglat": [120.28529440920339, 36.36612646280445], "mask_flags": [["all_valid"]], "nodata": null, "res": [43.14976252405522, 43.14976252405522], "shape": [5039, 4004], "tiled": true, "transform": [43.14976252405522, 0.0, 13303711.89897836, 0.0, -43.14976252405522, 4459833.289155098, 0.0, 0.0, 1.0], "units": [null], "width": 4004}
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@chenchaoqdu 分辨率是 43.14976252405522 , 不能对应到 web 墨卡托坐标系中对应图层的标准分辨率, 可以尝试对影像进行插值, 插值到最接近图层的标准分辨率, 然后再进行发布。
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这个影像如何插值啊,能不能讲一下
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@chenchaoqdu 准确的说法应该是 栅格数据重采样
,自行搜索, arcgis, qgis,gdal 都可以实现
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是不是用gdalwarp处理时,加上-r参数进行栅格数据重采样也可以?
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试一下不就知道了, gdal 的文档比我要权威吧。
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您好,我最近通过你这个文章成功发布了类似的服务,进而使用了maptalks做出了地形三维可视化,我想写一篇类似的博客,先是阐述你这个方法,再阐述我使用maptalks做地形三维可视化的方法,借此想问一下能不能复述你的方法呢,当然我会附上参考的连接。
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@wangsihao19981113 没问题的,不过maptalks似乎很少人使用啊
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maptalks确实用的人不是很多,但各方面拓展还算可以
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请问你发表的文章的地址是什么,方便看一下么?
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