sanya-data-management-back/onemap-modules/onemap-spatial/src/main/resources/mapper/postgresql/ImageMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.onemap.spatial.mapper.ImageMapper">

    <resultMap id="ImageRasterMap" type="com.onemap.spatial.domain.ImageRaster">
        <id column="rid" property="rid"/>
        <result column="rast" property="rast" typeHandler="com.onemap.spatial.typehandler.PGobjectTypeHandler"/>
    </resultMap>

    <select id="getRasterDataByWKT" resultMap="ImageRasterMap">
        SELECT *
        FROM image_16
        WHERE public.ST_Intersects(rast, public.ST_GeomFromText(#{wkt}, 4326))
    </select>

    <!--    <select id="getRasterImage" resultType="String">-->
    <!--        SET-->
    <!--        postgis.gdal_enabled_drivers = 'ENABLE_ALL';-->
    <!--        WITH geom AS (SELECT PUBLIC.ST_GeomFromText(#{wkt}, 4326) AS POLYGON),-->
    <!--             merged_raster AS (SELECT PUBLIC.ST_Union(rast) AS rast-->
    <!--                               FROM image15,-->
    <!--                                    geom-->
    <!--                               WHERE PUBLIC.ST_Intersects(rast, geom.POLYGON))-->
    <!--        SELECT encode(PUBLIC.ST_AsPNG(PUBLIC.ST_Clip(rast, 1, ST_Envelope(geom.POLYGON), TRUE)), 'base64') AS png-->
    <!--        FROM merged_raster,-->
    <!--             geom;-->
    <!--    </select>-->

    <!--彩色原始范围-->
    <!--    <select id="getRasterImage" resultType="String">-->
    <!--        SET-->
    <!--        postgis.gdal_enabled_drivers = 'ENABLE_ALL';-->
    <!--        WITH geom AS (SELECT ST_GeomFromText(#{wkt}, 4326) AS POLYGON),-->
    <!--             clipped_rasters AS (SELECT ST_Clip(rast, geom.POLYGON) AS rast_clip-->
    <!--                                 FROM image15,-->
    <!--                                      geom-->
    <!--                                 WHERE ST_Intersects(rast, geom.POLYGON)),-->
    <!--             merged_raster AS (SELECT ST_Union(rast_clip) AS rast_union-->
    <!--                               FROM clipped_rasters)-->
    <!--        SELECT encode(ST_AsPNG(rast_union), 'base64') AS png-->
    <!--        FROM merged_raster;-->
    <!--    </select>-->


    <!--    外接矩形-->
    <select id="getRasterImage" resultType="String">
        SET
        postgis.gdal_enabled_drivers = 'ENABLE_ALL';
        WITH geom AS (SELECT ST_GeomFromText(#{wkt}, 4326) AS POLYGON),
             clipped_rasters AS (SELECT ST_Clip(rast, ST_Envelope(geom.POLYGON)) AS rast_clip
                                 FROM image15,
                                      geom
                                 WHERE ST_Intersects(rast, ST_Envelope(geom.POLYGON))),
             merged_raster AS (SELECT ST_Union(rast_clip) AS rast_union
                               FROM clipped_rasters)
        SELECT encode(ST_AsPNG(rast_union), 'base64') AS png
        FROM merged_raster;
    </select>


    <select id="getWktImage" resultType="String">
        SET
        postgis.gdal_enabled_drivers = 'ENABLE_ALL';
        WITH geom AS (SELECT ST_GeomFromText(#{wkt}, 4326) AS polygon),
             geom_extent
                 AS (SELECT ST_AsRaster(geom.polygon, ${width}, ${height}, ARRAY['8BUI'], ARRAY[1], ARRAY[0]) AS raster_data
                     FROM geom)
        SELECT encode(ST_AsPNG(geom_extent.raster_data), 'base64') AS png
        FROM geom_extent;
    </select>
</mapper>