默认情况下，在海岸周边的海图数据，是具备陆地信息，因此在发布服务之后，是能够看到陆地要素的，如下
而在某些业务场景，我们需要的隐藏陆地要素，通常有两种做法
- 自己具备陆地要素的地图服务，那么将海图服务放在底层，陆地地图服务放在上层即可
- 如本身不具备完整的陆地地图服务，那么以上做法则无法满足要求，则需要对海图MCS服务进行控制，本文介绍这种处理方式
MCS服务端控制
海图数据本身是分物标对象存储，不以GIS常规的图层方式进行数据存储，在ArcGIS Maritime Server中进行数据的抽取以及图层重构，并以S52规范进行显示控制，图层配置信息写在S52DisplayProperties.xml文件，如下13个可控制图层，修改一下value值，可后台固定化配置，修改完成后，重启相应服务即可
<Parameter name="0" type="E" default="2" value="2"
range="11000-11999,21010-21029,21031-21999,31000-31009,31012-31029,31032-31999">
<Description>Information about the chart display</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="1" type="E" default="2" value="2"
range="12000-12999,22000-22999,32000-32999">
<Description>Natural and man-made features, port features</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="2" type="E" default="2" value="2"
range="13000-13999,23000-23009,23011-23999,33000-33999">
<Description>Depths, currents, etc</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="3" type="E" default="2" value="2"
range="14000-14999,24000-24999,34000-34999">
<Description>Seabed, obstructions, pipelines</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="4" type="E" default="2" value="2"
range="15000-15999,25000-25999,35000-35999">
<Description>Traffic routes</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="5" type="E" default="2" value="2"
range="16000-16999,26000-26999,36000-36999">
<Description>Special areas</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="6" type="E" default="2" value="2"
range="17000-17999,27000-27999,37000-37999">
<Description>Buoys, beacons, lights, fog signals, radar</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="7" type="E" default="2" value="2"
range="18000-18999,28000-28999,38000-38999">
<Description>Services and small craft facilities</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="8" type="E" default="2" value="1" range="31010">
<Description>Data quality</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="9" type="E" default="2" value="1" range="31011">
<Description>Low accuracy</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="10" type="E" default="2" value="1" range="31030,31031">
<Description>Additional chart information</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="11" type="E" default="2" value="1" range="23010">
<Description>Shallow water pattern</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
<Parameter name="12" type="E" default="2" value="1" range="21030">
<Description>Overscale warning</Description>
<ExpectedInput code="1" value="False" />
<ExpectedInput code="2" value="True" />
</Parameter>
图层对应关系表
| id | Description | 备注 | |
|---|---|---|---|
| 0 | Information about the chart display | 图表信息 | |
| 1 | Natural and man-made features, port features | 路地区和人造区、港口、陆地 | |
| 2 | Depths, currents, etc | 等深区、水流 | |
| 3 | Seabed, obstructions, pipelines | 海底、障碍物、管道 | |
| 4 | Traffic routes | 航路 | |
| 5 | Special areas | 特殊区域 | |
| 6 | Buoys, beacons, lights, fog signals, radar | 浮标、信标、灯光、雾灯、雷达 | |
| 7 | Services and small craft facilities | 服务设施、小船 | |
| 8 | Data quality | 数据质量 | |
| 9 | Low accuracy | 低精度模式 | |
| 10 | Additional chart information | 图表信息 | |
| 11 | Shallow water pattern | 浅水模式 | |
| 12 | Overscale warning | 超标警告 |
MCS浏览器端控制
观察海图MCS服务，其中请求返回的元数据信息如下，其中layers对象与S52DisplayProperties.xml文件中的图层对象信息一致，因此可以使用MapServer服务export接口的layers参数进行图层绘制的控制。
{
"currentVersion": 10.9,
"serviceDescription": "ArcGIS for Maritime Server's Maritime Chart Service capability is a Server Object Extension that provides both OGC WMS and Esri REST services to quickly view and query your S-57 or S-63 encrypted datasets.",
"mapName": "Maritime Chart Service",
"description": "",
"copyrightText": "",
"layers": [
{
"id": 0,
"name": "Information about the chart display",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 1,
"name": "Natural and man-made features, port features",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 2,
"name": "Depths, currents, etc",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 3,
"name": "Seabed, obstructions, pipelines",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 4,
"name": "Traffic routes",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 5,
"name": "Special areas",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 6,
"name": "Buoys, beacons, lights, fog signals, radar",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 7,
"name": "Services and small craft facilities",
"defaultVisibility": true,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 8,
"name": "Data quality",
"defaultVisibility": false,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 9,
"name": "Low accuracy",
"defaultVisibility": false,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 10,
"name": "Additional chart information",
"defaultVisibility": false,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 11,
"name": "Shallow water pattern",
"defaultVisibility": false,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
},
{
"id": 12,
"name": "Overscale warning",
"defaultVisibility": false,
"parentLayerId": -1,
"subLayerIds": null,
"minScale": 0,
"maxScale": 0
}
],
"tables": [
],
"spatialReference": {
"wkid": 102100
},
"singleFusedMapCache": false,
"initialExtent": {
"xmin": 11020629.5885340851,
"ymin": -1006021.06275513361,
"xmax": 13747957.1129692867,
"ymax": 2937284.43742384249,
"spatialReference": {
"wkid": 102100
}
},
"fullExtent": {
"xmin": -19926188.8519959711,
"ymin": -30240971.9583862536,
"xmax": 19926188.8519959711,
"ymax": 30240971.9583862051,
"spatialReference": {
"wkid": 102100
}
},
"units": "esriMeters",
"supportedImageFormatTypes": "PNG, PDF",
"capabilities": "Map,Query",
"documentInfo": {
"title": "Maritime Chart Service",
"author": "ArcGIS for Maritime Server",
"comments": "Not to be used for navigation.",
"subject": "S-57 Web Services",
"category": "S-57",
"keywords": "S-57"
}
}
export接口layers参数
Determines which layers appear on the exported map. There are four ways to specify which layers are shown:
- show—Only the layers specified in this list will be exported.
- hide—All layers except those specified in this list will be exported.
- include—In addition to the layers exported by default, the layers specified in this list will be exported.
- exclude—The layers exported by default excluding those specified in this list will be exported.
Syntax
//Where layerId1 and layerId2 are the layer ids returned by the map service resource
[show | hide | include | exclude]:layerId1,layerId2
Example
layers=show:2,4,7
前端请求方式
通过defaultVisibility可以观察到，在默认请求下，id为8、9、10、11、12图层为关闭绘制状态，一般情况下不需要显示。
综合以上信息，只需额外关闭id为1的图层即可，但需注意，默认关闭的图层，如无特殊需要，也请关闭
let layer = new MapImageLayer({
url: url,
customParameters: {
"layers": "show:0,2,3,4,5,6,7",
}
});
完整demo如下
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<title>
Intro to ENC Layer
</title>
<style>
html,
body,
#viewDiv {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
}
</style>
<link rel="stylesheet" href="https://js.arcgis.com/4.27/esri/themes/light/main.css" />
<script src="https://js.arcgis.com/4.27/"></script>
<script>
require(["esri/Map", "esri/views/MapView", "esri/layers/MapImageLayer"], (Map, MapView, MapImageLayer) => {
const map = new Map({
basemap: "topo-vector"
});
let layer = new MapImageLayer({
url: "https://192.168.1.34:6443/arcgis/rest/services/SampleWorldCities/MapServer/exts/MaritimeChartService/MapServer",
customParameters: {
"layers": "show:0,2,3,4,5,6,7"
}
});
map.add(layer);
const view = new MapView({
container: "viewDiv",
map: map,
zoom: 4,
center:[113,23]
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
效果如下
