/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2019, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
*/
package org.geotools.tutorial.quickstart;
import java.io.File;
import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.map.FeatureLayer;
import org.geotools.map.Layer;
import org.geotools.map.MapContent;
import org.geotools.styling.SLD;
import org.geotools.styling.Style;
import org.geotools.swing.JMapFrame;
import org.geotools.swing.data.JFileDataStoreChooser;
/**
* Prompts the user for a shapefile and displays the contents on the screen in a map frame.
*
*
This is the GeoTools Quickstart application used in documentationa and tutorials. *
*/
public class Quickstart {
/**
* GeoTools Quickstart demo application. Prompts the user for a shapefile and displays its
* contents on the screen in a map frame
*/
public static void main(String[] args) throws Exception {
// display a data store file chooser dialog for shapefiles
File file = JFileDataStoreChooser.showOpenFile("shp", null);
if (file == null) {
return;
}
FileDataStore store = FileDataStoreFinder.getDataStore(file);
SimpleFeatureSource featureSource = store.getFeatureSource();
// Create a map content and add our shapefile to it
MapContent map = new MapContent();
map.setTitle("Quickstart");
Style style = SLD.createSimpleStyle(featureSource.getSchema());
Layer layer = new FeatureLayer(featureSource, style);
map.addLayer(layer);
// Now display the map
JMapFrame.showMap(map);
}
}
1.我们需要下载一些示例数据来使用。http://www.naturalearthdata.com/项目是一个由北美制图信 息协会支持的伟大项目。到下面的链接下载一些文化载体。你可以使用顶部的“Download all 50m cultural themes”。 1:50m文化载体 请将上述数据解压到您可以轻松找到的位置，如桌面。 1:50m Cultural Vectors 解压到一个容易找到的地方 2.运行应用程序以打开文件选择器。从示例数据集中选择一个shapefile
/**
* This method demonstrates using a memory-based cache to speed up the display (e.g. when
* zooming in and out).
*
*
There is just one line extra compared to the main method, where we create an instance of
* CachingFeatureStore.
*/
public static void main(String[] args) throws Exception {
// display a data store file chooser dialog for shapefiles
File file = JFileDataStoreChooser.showOpenFile("shp", null);
if (file == null) {
return;
}
FileDataStore store = FileDataStoreFinder.getDataStore(file);
SimpleFeatureSource featureSource = store.getFeatureSource();
SimpleFeatureSource cachedSource =
DataUtilities.source(
new SpatialIndexFeatureCollection(featureSource.getFeatures()));
// Create a map content and add our shapefile to it
MapContent map = new MapContent();
map.setTitle("Using cached features");
Style style = SLD.createSimpleStyle(featureSource.getSchema());
Layer layer = new FeatureLayer(cachedSource, style);
map.addLayer(layer);
// Now display the map
JMapFrame.showMap(map);
}
A ROWID is an identification tag unique for each row of an Oracle Database table. The ROWID can be thought of as a virtual column, containing the ID for each row.
The oracle.sql.ROWID class i
public class DeleteNode_O1_Time {
/**
* Q 60 在O(1)时间删除链表结点
* 给定链表的头指针和一个结点指针(!!)，在O(1)时间删除该结点
*
* Assume the list is:
* head->...->nodeToDelete->mNode->nNode->..
格式定义The format specifiers supported by the NSString formatting methods and CFString formatting functions follow the IEEE printf specification; the specifiers are summarized in Table 1. Note that you c
概念
AngularJS is a structural framework for dynamic web apps.
了解更多详情请见原文链接：http://www.gbtags.com/gb/share/5726.htm
Directive
扩展html，给html添加声明语句，以便实现自己的需求。对于页面中html元素以ng为前缀的属性名称，ng是angular的命名空间
