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数据库中用image类型规格保存二进制数据，ADO.Net是通过byte[]来对应数据。图片的选择：openFileDig选择图片文件，然后把图片拷贝到MemoryStream中显示把图片Stream显示的方法：Bitmapimage bmpimg=new BitmapImage();bmpImg.BeginInit();bmpImg.StreamSource=photoStream;bmpImg.EndInit();imgPhoto.Source=bmpImg; 阅读全文
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Product AvailabilityAvailable with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.DescriptionThe RasterBand object represents an existing band of a raster dataset. This band may be the only band in a single raster dataset or one band in a multiband raster dataset.A RasterBand can be obtained from 阅读全文
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ConstantValueDescriptionPT_UNKNOWN-1Pixel values are unknown.PT_U10Pixel values are 1 bit.PT_U21Pixel values are 2 bits.PT_U42Pixel values are 4 bits.PT_UCHAR3Pixel values are unsigned 8 bit integers.PT_CHAR4Pixel values are 8 bit integers.PT_USHORT5Pixel values are unsigned 16 bit integers.PT_SHORT 阅读全文
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DescriptionA Point is a zero-dimensional object that represents a specific (X, Y) location in a the two-dimensional XY-Plane. A Point may also have Z, M, and ID attributes associated with it. Existence of attributes does not alter the dimensionality of a Point nor does it alter geometric calculation 阅读全文
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打开栅格目录中的一个数据 IRasterDataset GetRasterCatalogItem(IRasterCatalog pCatalog, int pObjectID) { //栅格目录继承了IFeatureClass IFeatureClass pFeatureClass = (IFeatureClass)pCatalog; IRasterCatalogItem pRasterCatalogItem = (IRasterCatalogItem)pFeatureClass.GetFeature(pObjectID); return pRasterCatalogItem.Ra... 阅读全文
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When To UseUse IWorkspaceFactory when you need to create a new workspace, connect to an existing workspace or find information about a workspace.MembersDescriptionContainsWorkspaceIndicates if parentDirectory contains a valid workspace, or is a valid file-system workspace.CopyCopies a workspace to t 阅读全文
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打开栅格数据要打开一个栅格数据,这个有点类似我们打开FeatureClass一样,先要获取工作空间,只不过我们过于要素类的时候需要IFeatureWorkspace,而栅格数据则需要IRasterWorkspace,示例如下: IRasterWorkspace GetRasterWorkspace(string pWsName) { try { IWorkspaceFactory pWorkFact = new RasterWorkspaceFactoryClass(); return pWorkFact.OpenFromFile(pWsName, 0) as IRasterWork... 阅读全文
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栅格数据介绍 在空间数据库中，Esri对栅格数据提供了三种模型，栅格数据集，栅格目录，以及ArcGIS 10 中新推出的镶嵌数据集。 栅格数据集也就是我们经常所得jpg,tif文件等，ArcGIS 将这些栅格数据抽象为RasterDataset，栅格数据集就代表了磁盘中的一个文件，它由一个或多个波段组成。在使用栅格数据集的时候，栅格数据会被转换成IMG文件存储在数据库中。 我们可以对栅格数据集进行一些操作，如改变空间参考，建立影像金字塔等。栅格目录，正如其名字一样是一个目录，跟书的目录相似，它记录了一个或者多个栅格数据集，每一个栅格数据集都作为一条记录存储在栅格目录中。栅格目录对栅格数据集的管 阅读全文
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void CreateDomain(IWorkspace pWorkspace) { IWorkspaceDomains pWorkspaceDomains = (IWorkspaceDomains)pWorkspace; ICodedValueDomain pCodedValueDomain = new CodedValueDomainClass(); pCodedValueDomain.AddCode("RES", "Residential"); pCodedValueDomain.AddCode("COM", "Com 阅读全文
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public void ChangeFieldAliasName(ITable pTable, string pOriFieldName, string pDesFieldName) { IClassSchemaEdit pClassSchemaEdit = (IClassSchemaEdit)pTable; //给对象加上锁 ISchemaLock pSchemaLock = (ISchemaLock)pTable; pSchemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock); if (pTable... 阅读全文