【GIS】ArcGIS瓦片组织规则

1.  ArcGIS Server瓦片格式

1.1. 文件说明

第一层目录：瓦片描述信息，包含了：conf.xml、conf.cdi及缺省标注目录名_ _alllayers

第二层目录：L+层数（0补齐,2位数）

第三层目录：R+瓦片行号的16进制的8位数（0补齐）

第四层目录：C+瓦片列号的16进制的8位数（0补齐）

conf.xml：定义了坐标投影参考信息、瓦片分级信息

conf.cdi：定义了瓦片覆盖区域

_alllayers：分级存储了瓦片目录

1.2. 文件目录

1.1.1.  第一层

 

1.1.2.  第二层

 

1.1.3.  第三层

 

1.1.4.  第四层

 

1.3. 切片规则

经纬度坐标一般默认(x0,y0)=（-400,400）作为切图的起始点，即从这开始算行列号。假设切图的地图某点坐标为x，y,切图的瓦片大小为256，其瓦片的级别分辨率为resolution，则计算该地图点的行列号计算如下：

col  = | floor((x0 - x)/(256*resolution)) |;

row = | floor((y0 - y)/(256*resolution)) |;

LOGInfos是每个层级切片信息，ID是层级，Scale是比例尺大小，Resolution是当前比例尺层级下切片的每个像素点代表的实际长度；

0级  Resolution = 20037508.3427892 * 2 / 256 = 156543.03392804062

1级  Resolution = 20037508.3427892 * 2 / 256 / 2 = 78271.51696402031

n级  Resolution = 20037508.3427892 * 2 / 256 / 2 ^ n = ****

……………….

col  = |  floor((x0 - x)/(256*resolution)) = floor((-20037508.3427892-(-20037508.3427892)/(256 * 156543.03392804062))  |  = 0

row = |  floor((y0 - y)/(256*resolution)) = flow((20037508.3430388-20037508.3430388)/(256 *  156543.03392804062)) |  = 0

col  = | floor((x0 - x)/(256*resolution)) = floor((-20037508.3427892-12388034.5186361)/(256 * 156543.03392804062)) |  = 0

row = | floor((y0 - y)/(256*resolution)) = flow((20037508.3430388-3594413.03659627)/(256 * 156543.03392804062)) |  = 0

col  = | floor((x0 - x)/(256*resolution)) = floor((-20037508.3427892-12388034.5186361)/(256 * 0.597164283477939)) | = 212106 = 33C8A（转16进制）

row = | floor((y0 - y)/(256*resolution)) = flow((20037508.3430388-3594413.03659627)/(256 * 0.597164283477939)) | = 107559 = 1A427（转16进制）

 

 

 瓦片存储路径位于：

 

 

<EnvelopeN>

  <XMin>12388034.5186361</XMin>

  <YMin>3594413.03659627</YMin>

  <XMax>12393881.9512999</XMax>

  <YMax>3600795.52845809</YMax>

</EnvelopeN>

<TileOrigin xsi:type="typens:PointN">

      <X>-20037508.3427892</X>

      <Y>20037508.3430388</Y>

    </TileOrigin>

    <TileCols>256</TileCols>

    <TileRows>256</TileRows>

    <DPI>96</DPI>

    <LODInfos xsi:type="typens:ArrayOfLODInfo">

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>0</LevelID>

        <Scale>591658710.91</Scale>

        <Resolution>156543.033928041</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>1</LevelID>

        <Scale>295829355.45</Scale>

        <Resolution>78271.5169640205</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>2</LevelID>

        <Scale>147914677.73</Scale>

        <Resolution>39135.7584820102</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>3</LevelID>

        <Scale>73957338.86</Scale>

        <Resolution>19567.8792410051</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>4</LevelID>

        <Scale>36978669.43</Scale>

        <Resolution>9783.93962050256</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>5</LevelID>

        <Scale>18489334.72</Scale>

        <Resolution>4891.96981025128</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>6</LevelID>

        <Scale>9244667.36</Scale>

        <Resolution>2445.98490512564</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>7</LevelID>

        <Scale>4622333.68</Scale>

        <Resolution>1222.99245256282</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>8</LevelID>

        <Scale>2311166.84</Scale>

        <Resolution>611.49622628141</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>9</LevelID>

        <Scale>1155583.42</Scale>

        <Resolution>305.748113140705</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>10</LevelID>

        <Scale>577791.71</Scale>

        <Resolution>152.874056570353</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>11</LevelID>

        <Scale>288895.85</Scale>

        <Resolution>76.4370282851763</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>12</LevelID>

        <Scale>144447.93</Scale>

        <Resolution>38.2185141425881</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>13</LevelID>

        <Scale>72223.96</Scale>

        <Resolution>19.1092570712941</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>14</LevelID>

        <Scale>36111.98</Scale>

        <Resolution>9.55462853564703</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>15</LevelID>

        <Scale>18055.99</Scale>

        <Resolution>4.77731426782352</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>16</LevelID>

        <Scale>9028</Scale>

        <Resolution>2.38865713391176</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>17</LevelID>

        <Scale>4514</Scale>

        <Resolution>1.19432856695588</Resolution>

      </LODInfo>

      <LODInfo xsi:type="typens:LODInfo">

        <LevelID>18</LevelID>

        <Scale>2257</Scale>

        <Resolution>0.597164283477939</Resolution>

      </LODInfo>

    </LODInfos>

1.4. 瓦片加载测试-ArcMap

1.4.1.  ArcMap链接磁盘文件夹

 

1.4.2.  文件夹所在磁盘路径

 

1.4.3.  拷贝该磁盘全路径字符串

 

1.4.4.  选中如下该图标

 

1.4.5.  ArcMap中地图区域看到瓦片数据