冲上云霄英文插曲【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：l、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）
chome第四层⽬录：C+⽡⽚列号的16进制的8位数（0补齐）
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：
moxa
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
lastchristmas
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）
reduce用法
the black mamba
⽡⽚存储路径位于：
<EnvelopeN>
<XMin>12388034.5186361</XMin>i3d
tellmewhoyouare<YMin>3594413.03659627</YMin>
中ip<XMax>12393881.9512999</XMax>
<YMax>3600795.52845809</YMax>
</EnvelopeN>
<TileOrigin xsi:type="typens:PointN">
<X>-20037508.3427892</X>
<Y>20037508.3430388</Y>
</TileOrigin>案山子
<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>
