topic Javascript API v2.5 WMSLayer Image Format Bug in ArcGIS JavaScript Maps SDK Questions

Javascript API v2.5 WMSLayer Image Format Bug

KurtisPoettcker — Thu, 20 Oct 2011 16:19:37 GMT

When upgrading to 2.5, it seems that the setImageFormat is ignored by the api. When I set the image format to png, the actual request goes out as .jpeg. The same code using version 2.4 of the api, works as expected. Here is the code for the wms service:

topoBaseLayer = new esri.layers.WMSLayer("http://wms.ess-ws.nrcan.gc.ca/wms/toporama_en");
topoBaseLayer.setVisibleLayers(["limits", "vegetation", "builtup_areas", "designated_areas", "hydrography", "hypsography", "water_saturated_soils", "landforms", "constructions", "water_features", "road_network", "railway", "populated_places", "structures", "power_network", "feature_names"]);
topoBaseLayer.setImageFormat("png");

The network traffic generated by v2.5 is shown in 2.5.jpg and the network traffic generated by v2.4 is shown in 2.4.jpg.

Just wondering if this is a bug in the new version or if I'm somehow not sending the request properly.

Thanks,

Kurtis.

Re: Javascript API v2.5 WMSLayer Image Format Bug

derekswingley1 — Sat, 11 Dec 2021 15:30:37 GMT

Looks like a bug, thanks for reporting this.

In the meantime, here's a workaround:

var topoBaseLayer = new esri.layers.WMSLayer("http://wms.ess-ws.nrcan.gc.ca/wms/toporama_en");
topoBaseLayer.setVisibleLayers(["limits", "vegetation", "builtup_areas", "designated_areas", "hydrography", "hypsography", "water_saturated_soils", "landforms", "constructions", "water_features", "road_network", "railway", "populated_places", "structures", "power_network", "feature_names"]);
dojo.connect(topoBaseLayer, 'onLoad', function(lyr) {
  lyr.setImageFormat("png");
});
map.addLayer(topoBaseLayer);

Re: Javascript API v2.5 WMSLayer Image Format Bug

Anonymous User — Thu, 20 Oct 2011 19:10:29 GMT

Original User: abadata

Thanks so much for the quick reply Derek.

The fix works great.

I appreciate the help,

Kurtis.

Re: Javascript API v2.5 WMSLayer Image Format Bug

derekswingley1 — Thu, 20 Oct 2011 19:32:19 GMT

Gladly. We'll either fix this or update the docs for the next release(2.6).