Set scale for each sublayer in ArcGISDynamicMapServiceLayer

Question

Hello there, Im trying to see how can i set the layer scale in a ArcGISDynamicMapServiceLayer. I have a service with this kind of url services/mycitycity/MapServer which contains 3 sublayers: cars, streets, people. So i did this code for adding the layer to a map (im using es6) var myLayer = new ArcGISDynamicMapServiceLayer(layers.read_dynamic_ap(),{}); myLayer .setImageFormat("png32"); var layerDefinitions = []; layerDefinitions[0] = "country= '"+ this.state.country[0].queryName+"'"; layerDefinitions[1] = "country= '"+ this.state.country[0].queryName+"'"; layerDefinitions[2] = "country= '"+ this.state.country[0].queryName+"'"; layerDefinitions[4] = "country = '"+ this.state.country[0].queryName+"'"; myLayer .setLayerDefinitions(layerDefinitions); mapp.addLayer(myLayer );‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ So when i see the layers on the map, its ok, but i want to show them in a different scale every one due to one of them contains too much data, and when u see it from afar, i get this: I dont know if i should separate each dynamic layer and add them using mapp.addLayers(dynLayer1,dynLayer2,dynLayer3) or how to set the scale separately. Also i want to know how can i put the visibility on and off for each one in case i need to separate them. Any example code should be great. I have been looking this websites: ArcGIS API for JavaScript Sandbox : cuz the main reason im changing the layers to dynamic (i use featured) its about the identify element over there. ArcGISDynamicMapServiceLayer | API Reference | ArcGIS API for JavaScript 3.19 Thanks in advice!

EvelynHernandez · Accepted Answer

Well its something i was thinking yesterday. I solved the problem already. Here its what i did (could be useful for someone) (im using es6 and react): 1.- I set layer definitions for each sublayer on the Dynamic Service. ( var layerDefinitions = []; layerDefinitions[0] = "COUNTRY = '"+ this.state.COUNTRY [0].queryName+"'"; layerDefinitions[1] = "COUNTRY = '"+ this.state.COUNTRY [0].queryName+"'"; ‍‍‍ 2.- I set a variable per many sublayer i wanted to add to the map. In this case im going to show just 2, one with scale and one with the default scale (for seeing for afar). Also i set the layer defs for each one. var carsLayer = new ArcGISDynamicMapServiceLayer(layers.read_dynamic_ap(),{ minScale: 6000}); carsLayer .setImageFormat("png32"); carsLayer .setVisibleLayers([0]); carsLayer .setLayerDefinitions(layerDefinitions); var streetsLayer = new ArcGISDynamicMapServiceLayer(layers.read_dynamic_ap(),{}); streetsLayer .setImageFormat("png32"); streetsLayer .setVisibleLayers([1]); streetsLayer .setLayerDefinitions(layerDefinitions);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ 3.- I added them to the map in the secuence i want to show them (for example i want the streets goes first, so i put it at last) mapp.addLayers([carsLayer , streetsLayer ]); ‍‍‍‍‍ 4.- Then how i wanna save the layers in some variable to use the show() and hide() method for the layerlist i made, i just keep them in dynamicService. this.setState({dynamicService: [carsLayer, streetsLayer]})‍‍‍‍‍‍ Then , for my custom layerList i made, i just change the visibility doing : this.state.dynamicService[0].show(); //the number is the position of the layer i saved and im going to use, this case is cars.‍‍‍‍‍‍‍ Thanks for all the help! I figure out how to solve my issue