使用 MapFish Print 打印图像层

Question

我尝试使用 MapFish Print 3 打印图像层。我尝试了几种不同的打印请求绝对图像路径、相对路径和 URL，但从未成功。打印成功完成，但没有显示图像。

我的要求是这样的：

{
    "outputFormat": "pdf",
    "layout": "A4 landscape",
    "outputFilename": "file",
    "attributes": {
        "map": {
            "dpi": "300",
            "rotation": 0,
            "bbox": [
                1617602.8915079264,
                5888215.094869674,
                1622199.0367374036,
                5890693.644391326
            ],
            "projection": "EPSG:3857",
            "layers": [
                {
                    "baseURL": "http://mapsNEU.wien.gv.at/basemap/bmapoverlay/normal/google3857/{TileMatrix}/{TileRow}/{TileCol}.png",
                    "imageFormat": "image/png",
                    "layer": "bmapoverlay",
                    "type": "WMTS",
                    "version": "1.0.0",
                    "requestEncoding": "REST",
                    "matrixSet": "google3857",
                    "matrices": [ ... ]
                },
                {
                    "type": "image",
                    "baseURL": "https://github.com/geotools/geotools/raw/main/geotools-logo.png",
                    "extent": [
                        1617602.8915079264,
                        5888215.094869674,
                        1622199.0367374036,
                        5890693.644391326
                    ],
                    "name": "test",
                    "opacity": 1,
                    "imageFormat": "image/png"
                }
            ]
        }
    }
}

我的 config.yaml 看起来

templates:
# default
  A4 landscape: !template
    reportTemplate: default/A4LandscapeReport.jrxml
    attributes:
      abteilung: !string {}
      title: !string {}
      user: !string {}
      zweck: !string {}
      myScale: !string {}
      kunde: !string {}
      img: !string {}
      map: !map
        maxDpi: 400
        width: 814
        height: 439
      scalebar: !scalebar
        width: 200
        height: 40
        default:
          align: "left"
          intervals: 3
          type: "bar"
          unit: "m"
      northArrowDef: !northArrow
        size: 30
        default:
          graphic: "file://NorthArrow_10.svg"
    processors:
    - !reportBuilder
      directory: 'default/.'
    - !createMap
      inputMapper: {map: map}
      outputMapper: {mapSubReport: mapSubReport, mapContext: mapContext}
    - !createScalebar {}
    - !createNorthArrow
        inputMapper: {map: map, northArrowDef: northArrow}

结果： 没有任何图像迹象的地图

Answer 1

摆弄之后，我意识到层的顺序被搞乱了，请参阅这个Bug。解决方案是更改顺序，直到达到期望的结果 - 遗憾的是没有发现规律性，感觉很随机，幸运的是它每次打印的顺序都是相同的。