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Project website postgis.net
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Translation license CC-BY-SA-3.0 PostGIS Manual
5 days ago

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Translated 100% 6,053 100% 107,002 100% 766,667
Needs editing 0% 0 0% 0 0% 0
Read-only 2% 125 1% 138 1% 1,722
Failing checks 0% 0 0% 0 0% 0
Strings with suggestions 0% 0 0% 0 0% 0
Untranslated strings 0% 0 0% 0 0% 0
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  2. PostGIS Manual
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BRIN stands for "Block Range Index". It is a general-purpose index method provided by PostgreSQL. BRIN is a <emphasis>lossy</emphasis> index method, meaning that a secondary check is required to confirm that a record matches a given search condition (which is the case for all provided spatial indexes). It provides much faster index creation and much smaller index size, with reasonable read performance. Its primary purpose is to support indexing very large tables on columns which have a correlation with their physical location within the table. In addition to spatial indexing, BRIN can speed up searches on various kinds of attribute data structures (integer, arrays etc). For more information see the <link xlink:href="https://www.postgresql.org/docs/current/brin.html">PostgreSQL manual</link>.
BRIN 代表 Block Range Index，是 PostgreSQL 提供的一种通用索引方法。BRIN 是一种 <emphasis>有损</emphasis> 索引，这意味着需要二次检查以确认记录是否符合搜索条件（所有空间索引都是如此）。它提供了更快的索引创建速度和更小的索引尺寸，同时读取性能仍然合理。BRIN 的主要用途是为与表内物理位置相关的列建立索引，以支持超大表的高效查询。除了空间索引，BRIN 还可以加速各种属性数据结构（整数、数组等）的搜索。更多信息请参见 <link xlink:href="https://www.postgresql.org/docs/current/brin.html">PostgreSQL manual</link>。
5 days ago
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Like the geometry data type, geography data is associated with a spatial reference system via a spatial reference system identifier (SRID). Any geodetic (long/lat based) spatial reference system defined in the <varname>spatial_ref_sys</varname> table can be used. You can add your own custom geodetic spatial reference system as described in <xref linkend="user-spatial-ref-sys"/>.
与 geometry 类型类似，geography 数据也通过空间参考系统标识符（SRID）关联到空间参考系统。<varname>spatial_ref_sys</varname> 表中定义的任何大地测量（基于经纬度）的空间参考系统都可以使用，也可以按 <xref linkend="user-spatial-ref-sys"/> 所述添加自定义的大地测量空间参考系统。
5 days ago
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Like the geometry data type, geography data is associated with a spatial reference system via a spatial reference system identifier (SRID). Any geodetic (long/lat based) spatial reference system defined in the <varname>spatial_ref_sys</varname> table can be used. You can add your own custom geodetic spatial reference system as described in <xref linkend="user-spatial-ref-sys"/>.
与 geometry 类型类似，geography 数据也通过空间参考系统标识符（SRID）关联到空间参考系统。spatial_ref_sys 表中定义的任何大地测量（基于经纬度）的空间参考系统都可以使用，也可以按 <xref linkend="user-spatial-ref-sys"/> 所述添加自定义的大地测量空间参考系统。
5 days ago
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[raster] Add ST_ReclassExact to quickly remap values in raster (Paul Ramsey)
[raster] 新增 ST_ReclassExact，用于快速重映射 raster 中的值（Paul Ramsey）
5 days ago
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<link xlink:href="https://git.osgeo.org/gitea/postgis/postgis/pulls/228">GT-228</link> [sfcgal] Add new functions (Scale, Translate, Rotate, Buffer 3D and Straight Skeleton Partition) from SFCGAL 2 (Loïc Bartoletti)
<link xlink:href="https://git.osgeo.org/gitea/postgis/postgis/pulls/228">GT-228</link>、[sfcgal] 从 SFCGAL 2 添加新函数（Scale、Translate、Rotate、Buffer 3D 和 Straight Skeleton Partition）（Loïc Bartoletti）
5 days ago
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<link xlink:href="https://trac.osgeo.org/postgis/ticket/5784">#5784</link>, <link xlink:href="https://git.osgeo.org/gitea/postgis/postgis/pulls/223">GT-223</link> Export circ_tree_distance_tree_internal for mobilitydb use (Maxime Schoemans)
<link xlink:href="https://trac.osgeo.org/postgis/ticket/5784">#5784</link>、<link xlink:href="https://git.osgeo.org/gitea/postgis/postgis/pulls/223">GT-223</link> 为 MobilityDB 导出 circ_tree_distance_tree_internal（Maxime Schoemans）
5 days ago
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<link xlink:href="https://trac.osgeo.org/postgis/ticket/1247">#1247</link>, [raster] ST_AsRasterAgg (Sandro Santilli)
<link xlink:href="https://trac.osgeo.org/postgis/ticket/1247">#1247</link>, [raster] ST_AsRasterAgg (Sandro Santilli)
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If the optional <code>gridSize</code> parameter is given (GEOS-3.9.0 or higher required), all result vertices are guaranteed to fall on a grid of the specified size. For the operation to give predictable results all the input vertices must fall already on the specified grid, see <xref linkend="ST_ReducePrecision"/>.
如果提供了可选参数 <code>gridSize</code>（需要 GEOS 3.9.0 或更高版本），则所有结果顶点都会落在指定网格上。为了保证操作结果可预测，所有输入顶点必须已经位于该网格上，详见 <xref linkend="ST_ReducePrecision"/>。
5 days ago
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