带有 RasterSource 的多个 ImageLayer 不可见
Multiple ImageLayer with RasterSource not visible
我正在尝试将具有不同范围的多个 Openlayer 图像层(使用栅格源)添加到单个地图。如果我添加一个图层,它会显示,但添加多个图层也不显示。
- 我认为
zindex
是我尝试更改但没有用的问题。
- 我测试添加后删除一个,然后第二个显示(一个未删除)
记录层数总是显示所有 3 层(我添加的 2 层和 1 个基础层,即地图)
this.raster = new RasterSource({
sources: [this.layer.getSource()],
operation: (pixels, data) => {
let pixel = pixels[0];
pixel[0] = 0;
pixel[1] = 255;
pixel[2] = 0;
return pixel;
}
});
let previewColorLayer = new ImageLayer({
opacity: 0.4,
source: this.raster,
extent: [972.145, 1948.98, 1270.395, 2082.48],
zIndex: 1000
// extent: ex
});
let previewColorLayer2 = new ImageLayer({
opacity: 0.4,
source: this.raster,
extent: [952.145, 1756.98, 1270.395, 1890.48],
zIndex: 2000
// extent: ex
});
this.overviewMap.getOverviewMap().addLayer(previewColorLayer);
this.overviewMap.getOverviewMap().addLayer(previewColorLayer2);
我尝试将栅格层示例分成两个范围并遇到同样的问题,似乎构建的源不能在超过一层中使用。但是您可以重用用于构造它的选项
this.rasterOptions = {
sources: [this.layer.getSource()],
operation: (pixels, data) => {
let pixel = pixels[0];
pixel[0] = 0;
pixel[1] = 255;
pixel[2] = 0;
return pixel;
}
};
let previewColorLayer = new ImageLayer({
opacity: 0.4,
source: new RasterSource(this.rasterOptions},
extent: [972.145, 1948.98, 1270.395, 2082.48],
zIndex: 1000
// extent: ex
});
let previewColorLayer2 = new ImageLayer({
opacity: 0.4,
source: new RasterSource(this.rasterOptions},
extent: [952.145, 1756.98, 1270.395, 1890.48],
zIndex: 2000
// extent: ex
});
我正在尝试将具有不同范围的多个 Openlayer 图像层(使用栅格源)添加到单个地图。如果我添加一个图层,它会显示,但添加多个图层也不显示。
- 我认为
zindex
是我尝试更改但没有用的问题。 - 我测试添加后删除一个,然后第二个显示(一个未删除)
记录层数总是显示所有 3 层(我添加的 2 层和 1 个基础层,即地图)
this.raster = new RasterSource({
sources: [this.layer.getSource()],
operation: (pixels, data) => {
let pixel = pixels[0];
pixel[0] = 0;
pixel[1] = 255;
pixel[2] = 0;
return pixel;
}
});
let previewColorLayer = new ImageLayer({
opacity: 0.4,
source: this.raster,
extent: [972.145, 1948.98, 1270.395, 2082.48],
zIndex: 1000
// extent: ex
});
let previewColorLayer2 = new ImageLayer({
opacity: 0.4,
source: this.raster,
extent: [952.145, 1756.98, 1270.395, 1890.48],
zIndex: 2000
// extent: ex
});
this.overviewMap.getOverviewMap().addLayer(previewColorLayer);
this.overviewMap.getOverviewMap().addLayer(previewColorLayer2);
我尝试将栅格层示例分成两个范围并遇到同样的问题,似乎构建的源不能在超过一层中使用。但是您可以重用用于构造它的选项
this.rasterOptions = {
sources: [this.layer.getSource()],
operation: (pixels, data) => {
let pixel = pixels[0];
pixel[0] = 0;
pixel[1] = 255;
pixel[2] = 0;
return pixel;
}
};
let previewColorLayer = new ImageLayer({
opacity: 0.4,
source: new RasterSource(this.rasterOptions},
extent: [972.145, 1948.98, 1270.395, 2082.48],
zIndex: 1000
// extent: ex
});
let previewColorLayer2 = new ImageLayer({
opacity: 0.4,
source: new RasterSource(this.rasterOptions},
extent: [952.145, 1756.98, 1270.395, 1890.48],
zIndex: 2000
// extent: ex
});