After the Imagery Cache is generated successfully, a series of folder structures will be generated under the cache Export Directory specified by the user. For details, please refer to the introduction of Cache Directory .
After the cache file is stored in the corresponding folder according to the rules, the system will also generate a Config File under the cache root directory, corresponding to the Imagery Cache. The Config File is in the *.sci3d format, and the *.sci3d file is an XML file. Cache Path:, Geographic Range of data, number of layers, block size and other information are recorded. When the user loads the image Cache Data in the 3D environment, the corresponding Cache Data can be loaded by loading the Config File of Imagery Cache. The contents of the Imagery CacheConfig File are as follows.
Imagery Cache Config File *.sci3d
<? xml version="1.0" encoding="UTF-8"?> < SuperMapCache> & lt;!-Version number of the cache file -- & gt; <sml:Version> 5.0</sml:Version> <sml:MinorVersion> 1</sml:MinorVersion> <sml:VersionRequired> 5.0</sml:VersionRequired> <!—Cache Name--> <sml:CacheName> day@World</sml:CacheName> < sml:Provider/> < sml:MapName/> < sml:HashCode/> <;!-Cached Projection -- < sml:CoordinateReferenceSystem> <;!-Reference Coordinate System -- < sml:Nameset> <sml:name> Longitude / Latitude Coordinate System---GCS_WGS_1984</sml:name> </sml:Nameset> <sml:Type> 1</sml:Type> <sml:Units> METER</sml:Units> <!—Geographic Coordinate System--> < sml:GeographicCoordinateSystem> < sml:Nameset> <sml:Name> GCS_WGS_1984</sml:Name> </sml:Nameset> <sml:Type> 4326</sml:Type> <sml:Units> DEGREE</sml:Units> <!—Geodetic Reference System--> < sml:HorizonalGeodeticDatum> & lt;!-Geodetic Reference System Name -- & gt; < sml:Nameset> <sml:Name> D_WGS_1984</sml:Name> </sml:Nameset> <sml:Type> 6326</sml:Type> <!—Reference Spheroid--> < sml:Ellipsoid> < sml:Nameset> <sml:Name> WGS_1984</sml:Name> </sml:Nameset> <sml:Type> 7030</sml:Type> <!—Semimajor Axis--> <sml:SemiMajorAxis> 6378137.0000000000</sml:SemiMajorAxis> <!—Spheroid Flattening--> <sml:InverseFlattening> 298.2572235630</sml:InverseFlattening> </sml:Ellipsoid> </sml:HorizonalGeodeticDatum> <!—Center Meridian--> < sml:PrimeMeridian> !-Center Meridian Name -- < sml:Nameset> <sml:Name> Greenwich</sml:Name> </sml:Nameset> <sml:Type> 8901</sml:Type> <sml:PrimeMeridian> 0.0000000000</sml:PrimeMeridian> </sml:PrimeMeridian> </sml:GeographicCoordinateSystem> < sml:MapProjection> < sml:Nameset> < sml:Name/> </sml:Nameset> <sml:Type> 43000</sml:Type> </sml:MapProjection> <!—Parameters--> < sml:Parameters> <!—Offset X--> <sml:FalseEasting> 0.0000000000</sml:FalseEasting> <!—Offset Y--> <sml:FalseNorthing> 0.0000000000</sml:FalseNorthing> <;!-Center Meridian Angle Value -- <sml:CentralMeridian> 0.0000000000</sml:CentralMeridian> <;-first standard parallel -- >; <sml:StandardParallel1> 0.0000000000</sml:StandardParallel1> <;!-2nd standard parallel -- >; <sml:StandardParallel2> 0.0000000000</sml:StandardParallel2> <!—Scale Factor--> <sml:ScaleFactor> 0.0000000000</sml:ScaleFactor> <;!-Latitude of origin -- <sml:CentralParallel> 0.0000000000</sml:CentralParallel> <;!-Azimuth -- <sml:Azimuth> 0.0000000000</sml:Azimuth> <;!-meridian of first point -- >; <sml:FirstPointLongitude> 0.0000000000</sml:FirstPointLongitude> <;!-meridian of second point -- >; <sml:SecondPointLongitude> 0.0000000000</sml:SecondPointLongitude> </sml:Parameters> </sml:CoordinateReferenceSystem> < sml:Scales> < sml:Scale> <sml:Value> 0.00000000169016357160</sml:Value> <sml:Caption> 591658711</sml:Caption> </sml:Scale> < sml:Scale> <sml:Value> 0.00000000338032714321</sml:Value> <sml:Caption> 295829355</sml:Caption> </sml:Scale> < sml:Scale> <sml:Value> 0.00000000676065428641</sml:Value> <sml:Caption> 147914678</sml:Caption> </sml:Scale> < sml:Scale> <sml:Value> 0.00000001351470637137</sml:Value> <sml:Caption> 73993468</sml:Caption> </sml:Scale> </sml:Scales> < sml:ClipRegion/> < sml:UserExtendFields> < sml:UserExtendField> <sml:Key> WebMapType</sml:Key> <sml:Value> 225</sml:Value> </sml:UserExtendField> </sml:UserExtendFields> </SuperMapCache>