缓存创建工作通过ArcGIS Toolbox工具完成,在ArcPy中,可以通过函数调用相应的工具,来实现脚本自动化创建缓存。
创建缓存有几个步骤,首先设置Python环境变量,代码如下:# 设置环境变量 def SetWorkspace(folder): if os.path.isdir(folder) == False: print "输入的工作空间路径无效!" return env.workspace = folder
其次需要设置日志文件保存路径,代码如下:
def SetLogPath(logPath): currentTime = datetime.datetime.now() arg1 = currentTime.strftime("%H-%M") arg2 = currentTime.strftime("%Y-%m-%d %H:%M") global logfile logfile = os.path.join(logPath, 'report_%s.txt' % arg1) print "设置日志文件路径:"+logfile
# 创建切片模式文件 def CreateCacheTilingScheme(server, service, dataFrame, cacheDir, tilingScheme, scalesType, scales, dpi, tileWidth, tileHeight, cacheType, pathToXml, tileOrigin, scaleValues, inputLayers, antialiasing, tileFormat, tileCompressionQuality, storageFormat, useLocalCacheDir): # print results of the script to a report global logfile print "日志文件路径:"+logfile report = open(logfile,'w') try: starttime = time.clock() # server:服务器名称 # service:服务名称 # dataFrame:数据框名称 # cacheDir:缓存目录 # tilingScheme:NEW表示创建新的模式文件,PREDEFINED表示使用预定义的模式文件 # scalesType:创建新的缓存模式时,使用STANDARD比例尺自动分级或CUSTOM自定义比例尺 # scales:创建新的缓存模式时,如果用STANDARD方式,需要设置比例尺级数 # dpi:屏幕分辨率,一般96即可 # tileWidth:缓存图片的宽度,一般256或512像素 # tileHeight:缓存图片的高度,一般256或512像素 # cacheType:通常使用FUSED,也可使用MULTI_LAYER # pathToXml:预定义的缓存模式文件路径 # tileOrigin:切片原点,即左上角坐标 # scaleValues:如果scalesType=CUSTOM,自定义的比例尺,例如"600265;350200;225400;44000" # inputLayers:如果cacheType=MULTI_LAYER时,需要切片的图层名称 # antialiasing:是否反锯齿,NONE或ANTIALIASING # tileFormat:图片格式,PNG8、PNG24、PNG32、JPEG、MIXED # tileCompressionQuality:图片压缩比,0~100的整数 # storageFormat:存储形式,Compact或Exploded # useLocalCacheDir:是否使用本地缓存目录,TRUE或FALSE result = arcpy.CreateMapServerCache_server(server, service, dataFrame, cacheDir, tilingScheme, scalesType, scales, dpi, tileWidth, tileHeight, cacheType, pathToXml, tileOrigin, scaleValues, inputLayers, antialiasing, tileFormat, tileCompressionQuality, storageFormat, useLocalCacheDir) finishtime = time.clock() elapsedtime = finishtime - starttime #print messages to a file while result.status < 4: time.sleep(0.2) resultValue = result.getMessages() report.write ("completed " + str(resultValue)) print "Created cache schema with custom scales successfully for " + service + " in " + str(elapsedtime) + " sec \n on " + arg2 except Exception, e: # If an error occurred, print line number and error message tb = sys.exc_info()[2] report.write("Failed at step 1 \n" "Line %i" % tb.tb_lineno) report.write(e.message) print "已完成地图缓存模式创建。" report.close()
创建了缓存切片模式之后,需要调用ManageMapServerCacheTiles_server函数,具体代码如下:
# 管理缓存切片 def ManageCacheTiles(server, service, dataFrame, inputLayers, scaleValues, updateMode, extents, threadCount ,Antialiasing, pathToFeatureClass, ignoreStatus): # 打开日志文件 global logfile report = open(logfile,'w') try: starttime = time.clock() # server:服务器名称 # service:服务名称 # dataFrame:数据框名称 # scaleValues:需要创建缓存的比例尺 # inputLayers:需要创建缓存的图层名称 # antialiasing:该参数可忽略,因为缓存模式文件中已包含反锯齿设置 # updateMode:更新模式,Recreate Empty Tiles、Recreate All Tiles或Delete Tiles # extents:缓存创建的范围 # threadCount:缓存创建过程使用的线程数 # pathToFeatureClass:用于限定缓存创建区域的要素类 # ignoreStatus:是否忽略要素类的缓存创建状态,默认为IGNORE_COMPLETION_STATUS_FIELD,TRACK_COMPLETION_STATUS表示跟踪状态 result = arcpy.ManageMapServerCacheTiles_server(server, service, dataFrame, inputLayers, scaleValues, updateMode, extents, threadCount ,Antialiasing, pathToFeatureClass, ignoreStatus) finishtime = time.clock() elapsedtime= finishtime - starttime # 打印日志信息 while result.status < 4: time.sleep(0.2) resultValue = result.getMessages() report.write ("completed " + str(resultValue)) print "Created cache tiles for given schema successfully for " + service + " in " + str(elapsedtime) + " sec \n on " + arg2 except Exception, e: # If an error occurred, print line number and error message tb = sys.exc_info()[2] report.write("Failed at step 1 \n" "Line %i" % tb.tb_lineno) report.write(e.message) report.close() print "已完成地图服务缓存创建。"
import sys sys.path.append("E:\\Codes\\Python") from cacheHelper import SetWorkspace,SetLogPath,CreateCacheTilingScheme,ManageCacheTiles SetWorkspace("D:/TestData") SetLogPath("D:\\TestData") CreateCacheTilingScheme("localhost","sichuan","图层","D:\\arcgisserver\\arcgiscache","PREDEFINED","STANDARD","4","96","256","256","FUSED","D:\\TestData\\conf.xml","","","","ANTIALIASING","JPEG","75","Compact","TRUE") ManageCacheTiles("localhost","sichuan","图层","xzqh","1000000;500000;250000","Recreate All Tiles","","2","","TRACK_COMPLETION_STATUS")通过以上代码即可完成脚本自动切图工作。