Arcgis object for java 访问栅格数据,使用GP工具，进行栅格矢量化---栅格矢量化面。
程序员文章站
2022-06-12 23:50:03
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直接贴代码了，不多解释了。
1、栅格数据的存储类型
栅格数据一般可以存储为ESRI GRID（由一系列文件组成），TIFF格式（包括一个TIF文件和一个AUX文件），还有JPG,BMP文件，IMAGINE Image格式 在AE中一般调用ISaveAs接口来保存栅格数据。
2、栅格数据集和栅格编目的区别
一个栅格数据集由一个或者多个波段（RasterBand）的数据组成，一个波段就是一个数据矩阵。对于格网数据（DEM数据）和单波段的影像数据，表现为仅仅只有一个波段数据的栅格数据集，而对于多光谱影像数据则表现为具有多个波段的栅格数据集
栅格编目（RasterCatalog）用于显示某个研究区域内各种相邻的栅格数据，这些相邻的栅格数据没有经过拼接处理 合成一副大的影像图
3、IRasterWorkspaceEx与IRasterWorkspace ,IRsterWorkspace2的区别
1).IRasteWorkspaceEx接口主要是用来读取GeoDatabase中的栅格数据集和栅格编目
2) . IRasterWorkspace ,IRsterWorkspace2主要是用来读取以文件格式存储在本地的栅格数据
4、加载栅格数据（以存储在本地的栅格数据文件为例）
import com.esri.arcgis.carto.IRasterLayer;
import com.esri.arcgis.carto.RasterLayer;
import com.esri.arcgis.datasourcesraster.IRasterBand;
import com.esri.arcgis.datasourcesraster.IRasterBandCollection;
import com.esri.arcgis.datasourcesraster.IRasterBandCollectionProxy;
import com.esri.arcgis.datasourcesraster.RasterWorkspaceFactory;
import com.esri.arcgis.geodatabase.IDataset;
import com.esri.arcgis.geodatabase.IDatasetProxy;
import com.esri.arcgis.geodatabase.IRasterDataset;
import com.esri.arcgis.geodatabase.IRasterWorkspace2;
import com.esri.arcgis.geodatabase.IRasterWorkspace2Proxy;
import com.esri.arcgis.geodatabase.IWorkspaceFactory;
import com.esri.arcgis.geoprocessing.GeoProcessor;
import com.esri.arcgis.geoprocessing.tools.conversiontools.RasterToPolygon;
import com.esri.arcgis.system.AoInitialize;
import com.esri.arcgis.system.EngineInitializer;
import com.esri.arcgis.system.IPropertySet;
import com.esri.arcgis.system.esriLicenseProductCode;
import com.esri.arcgis.system.esriLicenseStatus;
public class RasterMain {
public RasterMain() {
}
public static void main(String[] args) {
System.out
.println("Starting RasterMain - An ArcObjects SDK Developer Sample");
try {
// Initialize engine console application
EngineInitializer.initializeEngine();
// Initialize ArcGIS license
AoInitialize aoInit = new AoInitialize();
initializeArcGISLicenses(aoInit);
// Get DEVKITHOME Home
System.out.println("Setup--------");
testRasterMethods();
System.out.println("Done.-----------");
// Ensure any ESRI libraries are unloaded in the correct order
aoInit.shutdown();
} catch (Exception e) {
System.out.println("Error: " + e.getMessage());
System.out.println("Sample failed. Exiting...");
e.printStackTrace();
System.exit(-1);
}
}
private static void testRasterMethods() throws Exception {
String rastFileDocPath = "D:\\temp\\test\\bmp";
String rastFilePath = "DST_DBLV_FY3A_MERSI_1000M_DXX_P001_20110407054000.bmp";
String outPolygonFeaturesPath = "D:\\temp\\test\\shp\\qincytewt999900t.shp";
IRasterWorkspace2 rasterWs = openRasterWorkspace(rastFileDocPath);
IRasterDataset rastDataset = rasterWs.openRasterDataset(rastFilePath);
IRasterDataset rastDatasetItem1 = getRasterDatasetItem(rastDataset, 1);
rasterToPolygon(rastDatasetItem1, outPolygonFeaturesPath);
}
private static IRasterWorkspace2 openRasterWorkspace(String rastFileDocPath)
throws Exception {
IWorkspaceFactory workspaceFact = new RasterWorkspaceFactory();
IRasterWorkspace2 rw2 = new IRasterWorkspace2Proxy(
workspaceFact.openFromFile(rastFileDocPath, 0));
return rw2;
}
private static void rasterToPolygon(IRasterDataset rasterDataset,
String outPolygonFeaturesPath) {
try {
GeoProcessor geoprocessor = new GeoProcessor();
RasterToPolygon rasterToPolygon = new RasterToPolygon();
String paramObject = "Value";
String simplify = "false";
rasterToPolygon.setOutPolygonFeatures(outPolygonFeaturesPath);
rasterToPolygon.setRasterField(paramObject);
IRasterLayer rasterLayer = new RasterLayer();
rasterLayer.createFromDataset(rasterDataset);
rasterToPolygon.setInRaster(rasterLayer);
rasterToPolygon.setSimplify(simplify);
//System.out.println(rasterToPolygon.getSimplify());
geoprocessor.execute(rasterToPolygon, null);
} catch (Exception e) {
//System.out.println("rasterToPolygon=" + e);
}
}
@SuppressWarnings("unused")
private static void BMP_EXIFtag(IRasterDataset exifDataset) {
try {
IDataset dataset = new IDatasetProxy(exifDataset);
IPropertySet propertySet = dataset.getPropertySet();
Object[] tag_names = new Object[1];
Object[] tag_values = new Object[1];
propertySet.getAllProperties(tag_names, tag_values);
String[] stringNames = (String[]) tag_names[0];
Object[] stringValues = (Object[]) tag_values[0];
for (int i = 0; i <= stringNames.length - 1; i++) {
System.out.print(stringNames[i] + ":");
System.out.println(stringValues[i]);
}
} catch (Exception e) {
System.out.println("BMP_EXIFtag" + e);
}
}
@SuppressWarnings("deprecation")
private static IRasterDataset getRasterDatasetItem(
IRasterDataset exifDataset, int num) throws Exception {
IRasterBandCollection rasterBands = new IRasterBandCollectionProxy(
exifDataset);
IRasterBand rasterBand = rasterBands.item(num);
System.out.println("rasterBand:" + rasterBand.getBandname());
IRasterDataset di = rasterBand.getRasterDataset();
return di;
}
/**
* Checks to see if an ArcGIS Engine Runtime license or an ArcView License
* is available. If so, then the appropriate ArcGIS License is initialized.
*
* @param aoInit
* The AoInitialize object instantiated in the main method.
*/
private static void initializeArcGISLicenses(AoInitialize aoInit) {
try {
if (aoInit
.isProductCodeAvailable(esriLicenseProductCode.esriLicenseProductCodeEngine) == esriLicenseStatus.esriLicenseAvailable)
aoInit.initialize(esriLicenseProductCode.esriLicenseProductCodeEngine);
else if (aoInit
.isProductCodeAvailable(esriLicenseProductCode.esriLicenseProductCodeArcView) == esriLicenseStatus.esriLicenseAvailable)
aoInit.initialize(esriLicenseProductCode.esriLicenseProductCodeArcView);
else {
System.err
.println("Could not initialize an Engine or ArcView license. Exiting application.");
System.exit(-1);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
5 详细情况可以使用esri 提供的java 帮助搜索 ，可以查询到在catalog 或者geobase 的例子。
6 本代码有报异常的错误，但是不影响使用，依然能栅格矢量化，不知道为什么，请高手帮忙解决这个问题。