How to modify renderer on one single layer?

Joachim_EckboJuell

Hi,

We have a rather complex dynamic map service with a lot of layers. And we would like to change the renderer on one of the layers in the export call, using dynamicLayers. But when we do so, only this single layer is drawn. How can we alter a renderer using dynamicLayers without having to supply all the rest of the layers along in the dynamicLayers-parameter?

Here is a sample, where I alter the renderer for the highways, and only this layer is drawn.
http://servicesbeta2.esri.com/arcgis/rest/services/USA/MapServer/export?bbox=-106.08211428430971%2C35.08449917393321%2C-92.90307849983995%2C42.37950075850303&bboxSR=4326&layers=&layerDefs=&size=400%2C300&imageSR=4326&format=png8&transparent=true&dpi=96&time=&layerTimeOptions=&dynamicLayers=[{%22id%22%3A101%2C%22source%22%3A{%22type%22%3A%22mapLayer%22%2C%22mapLayerId%22%3A1}%2C%22drawingInfo%22%3A{%22renderer%22%3A%0D%0A{%0D%0A+++%22type%22%3A+%22simple%22%2C%0D%0A+++%22symbol%22%3A+{%0D%0A++++%22type%22%3A+%22esriSLS%22%2C%0D%0A++++%22style%22%3A+%22esriSLSSolid%22%2C%0D%0A++++%22color%22%3A+[%0D%0A+++++255%2C%0D%0A+++++0%2C%0D%0A+++++0%2C%0D%0A+++++255%0D%0A++++]%2C%0D%0A++++%22width%22%3A+2%0D%0A+++}%2C%0D%0A+++%22label%22%3A+%22%22%2C%0D%0A+++%22description%22%3A+%22%22%0D%0A++}%0D%0A%0D%0A%0D%0A}}]&gdbVersion=&f=html

Thanks!

TanuHoque

jjuell,

That is the nature of dynamicLayers - map service only draws the layers that are defined in dynamicLayers parameter.
Please note:

• you must include all layers in dynamicLayers parameter that you want to *show* on the map
• do not include 'invisible' layers
• the order of layers in the dynamicLayers are important, as that is the order they will be drawn by the map service
• when a dynamicLayer refers to an existing layer with scale-visibility range, map service honors that scale-visibility

Since you are not modifying renderer for other layers, the definition of each layer by pointing its source to an existing layer should be pretty compact comparing to the defining a layer with renderer and/or labels...
here is an example:

[
{
    "id": 101,
    "source": {
        "type": "mapLayer",
        "mapLayerId": 1
    },
    "drawingInfo": { "renderer": { ... }, ... }
},
{
    "id": 102,
    "source": {
        "type": "mapLayer",
        "mapLayerId": 2
    }
},
{
    "id": 103,
    "source": {
        "type": "mapLayer",
        "mapLayerId": 3
    }
},
....
]