Java MeteoInfo解析与绘图代码教程详解

这篇文章主要介绍了Java MeteoInfo解析与绘图代码教程，对于后端导出图片的话,就需要添加色阶了,这一文很简单,就涉及色阶,名称,网格刻度线，感兴趣的朋友一起看看吧

最近太忙了,终于有时间继续写了,上文说到了基本上的绘图方法,但缺少色阶呈现,一般图叠加着地图上,后端不需要管色阶,但也要注意web页面色阶和我们的生成色阶一定要对的上

对于后端导出图片的话,就需要添加色阶了,这一文很简单,就涉及色阶,名称,网格刻度线

顺便对代码我进行了优化,看起来更直接

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									MeteoDataInfo meteoDataInfo = new MeteoDataInfo();

									        meteoDataInfo.openMICAPSData("D:\\解析数据\\cldas\\cldas\\TEM\\20081000.000");

									        GridData grid = meteoDataInfo.getGridData();

									        //读取地图A

									        VectorLayer scmap = MapDataManage.readMapFile_ShapeFile("C:\\Users\\Administrator\\Downloads\\好例子网_全国省、县界线shp格式矢量图（精确到县区域）\\全国省、县界线shp格式矢量图（精确到县区域）\\sichuan.shp");

									        //读取地图B

									        VectorLayer qgmap = MapDataManage.readMapFile_ShapeFile("E:\\shp\\四川\\四川省(3)_市界.shp");

									        //描述地图边界线

									        PolygonBreak pb = (PolygonBreak) qgmap.getLegendScheme().getLegendBreak(0);

									        //是否设置填充

									        pb.setDrawFill(false);

									        //设置轮廓颜色

									        pb.setOutlineColor(Color.black);

									        //读取色阶

									        LegendScheme als = LgsUtil.readFromLgs("D:\\apache-tomcat-8.0.50\\alt色阶\\TEM.lgs");

									        //绘制图层

									        VectorLayer layer = DrawMeteoData.createShadedLayer(grid,als,"","",true);

									        //创建视图

									        MapView view = new MapView();

									        layer = layer.clip(scmap);

									        //叠加图层

									        view.addLayer(layer);

									        view.addLayer(qgmap);

									        //视图设置

									        MapLayout layout = new MapLayout();

									        //去除图形边框

									        layout.getActiveMapFrame().setDrawNeatLine(true);

									        //抗锯齿

									        layout.getActiveMapFrame().setMapView(view);

									        view.setAntiAlias(true);

									        layout.setAntiAlias(true);

									        //根据视图计算视图的宽高

									        Extent extent = view.getExtent();

									        int size = 800;

									        Rectangle rectangle = new Rectangle(size, (int) (size * 1D / extent.getWidth() * extent.getHeight()));

									        //设置地图区域大小和外边距

									        int width = rectangle.width;

									        int left = 50;

									        int height = rectangle.height;

									        int right = 140;

									        int top = 50;

									        int bottom = 50;

									        //设置页面边界

									        layout.setPageBounds(new Rectangle(0, 0, width + left + right, height + top + bottom));

									        //获取地图框

									        MapFrame frame = layout.getActiveMapFrame();

									        //设置布局边界

									        frame.setLayoutBounds(new Rectangle(left, top, width, height));

									        //绘制网格刻度线

									        frame.setDrawGridLine(true);

									        //设置网格间隔值

									        frame.setGridXDelt(0.5);

									        frame.setGridYDelt(0.5);

									        //设置图例

									        Rectangle bounds = layout.getActiveMapFrame().getLayoutBounds();

									        LayoutLegend legend = layout.addLegend(bounds.x + bounds.width + 15, 0);

									        legend.setLegendStyle(LegendStyles.Normal);

									        legend.setTop(bounds.y + (bounds.height - legend.getHeight()) / 2);

									        legend.setLegendLayer(layer);

									        //导出

									        layout.exportToPicture(PathUtil.getDeskPath()+"/1.png");

Java MeteoInfo解析与绘图代码教程详解

以上的方法我只设定了刻度线和色阶,其他的也很简单,我在下面说明一下

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									标题设定-放到设定好视图大小的后面

									Rectangle bounds = layout.getActiveMapFrame().getLayoutBounds();

									layout.addText(title, bounds.x + bounds.width / 2, y, 18);