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2024年4月16日发(作者：学完python后学c语言)
geoserver wmts getfeatureinfo 瓦片行列号计算
When working with GeoServer's Web Map Tile Service (WMTS) and the
GetFeatureInfo request, accurately determining the tile row and
column numbers is crucial for retrieving the desired spatial
information. The GetFeatureInfo request allows clients to query
specific features from the map tiles, and knowing the correct tile
coordinates is essential for precise queries.
在使用GeoServer的Web地图瓦片服务（WMTS）和GetFeatureInfo请求
时，准确计算瓦片行列号对于检索所需的空间信息至关重要。
GetFeatureInfo请求允许客户端查询地图瓦片中的特定要素，而知道正确
的瓦片坐标则是精确查询的基础。
To calculate the tile row and column numbers, you typically need
the following information: the WMTS layer's tiling scheme, the
bounding box of the area of interest, and the zoom level or scale
denominator of the desired map view. The tiling scheme defines how
the map is divided into tiles, including the tile size, origin, and
possibly the tiling matrix sets.
要计算瓦片行列号，通常需要以下信息：WMTS图层的瓦片方案、感兴趣区
域的边界框以及所需地图视图的缩放级别或比例尺分母。瓦片方案定义了
地图如何被划分为瓦片，包括瓦片大小、起点和可能的瓦片矩阵集。
Once you have this information, you can use the bounding box
coordinates and the tiling scheme to calculate the tile row and
column indices. This involves converting the map coordinates to tile
coordinates by dividing the map's X and Y values by the tile size
and accounting for the tile origin. Additional considerations may
include handling edge cases where features span multiple tiles or
where the requested area does not align perfectly with tile
boundaries.
一旦有了这些信息，就可以使用边界框坐标和瓦片方案来计算瓦片行列索
引。这涉及将地图坐标转换为瓦片坐标，通过将地图的X和Y值除以瓦片
大小并考虑瓦片原点来实现。还需要考虑一些特殊情况，比如要素跨越多
个瓦片的情况，或者请求区域与瓦片边界不完全对齐的情况。
In GeoServer, the GetFeatureInfo request can be sent with the
appropriate parameters, including the tile row and column indices,
to retrieve information about the features present in the specified
tile. This information can then be used for various purposes, such
as displaying feature details on a client application or performing
further spatial analysis.
在GeoServer中，可以通过发送带有适当参数的GetFeatureInfo请求来
检索指定瓦片中要素的信息，这些参数包括瓦片行列索引。然后，这些信
息可以用于各种目的，例如在客户端应用程序上显示要素详细信息或进行
进一步的空间分析。
In summary, accurately calculating tile row and column numbers is
essential for effective use of the GetFeatureInfo request in
GeoServer's WMTS. By understanding the tiling scheme and utilizing
the available information, you can ensure that your queries are
targeting the correct tiles and retrieving the desired spatial data.
总之，准确计算瓦片行列号对于在GeoServer的WMTS中有效使用
GetFeatureInfo请求至关重要。通过了解瓦片方案并利用可用信息，您可
以确保查询针对正确的瓦片并检索所需的空间数据。
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