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‎Samples.xcodeproj/project.pbxproj‎

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‎Shared/Samples/Apply raster rendering rule/ApplyRasterRenderingRuleView.swift‎

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// Copyright 2024 Esri
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import ArcGIS
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import SwiftUI
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struct ApplyRasterRenderingRuleView: View {
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@State private var map = Map(basemapStyle: .arcGISTopographic)
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var body: some View {
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MapView(map: map)
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}
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}
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#Preview {
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ApplyRasterRenderingRuleView()
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}

‎Shared/Samples/Apply raster rendering rule/README.md‎

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# Apply raster rendering rule
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Display a raster on a map and apply different rendering rules to that raster.
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![Image of apply raster rendering rule](ApplyRasterRenderingRule.png)
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## Use case
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Raster images whose individual pixels represent elevation values can be rendered in a number of different ways, including representation of slope, aspect, hillshade, and shaded relief. Applying these different rendering rules to the same raster allows for a powerful visual analysis of the data. For example, a geologist could interrogate the raster image to map subtle geological features on a landscape, which may become apparent only through comparing the raster when rendered using several different rules.
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## How to use the sample
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Run the sample and use the drop-down menu at the top to select a rendering rule.
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## How it works
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1. Create an `ImageServiceRaster` using a URL to an online image service.
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2. After loading the raster, use `imageServiceRaster.getServiceInfo().getRenderingRuleInfos()` to get a list of `RenderingRuleInfo` supported by the service.
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3. Choose a rendering rule info to apply and use it to create a `RenderingRule`.
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4. Create a new `ImageServiceRaster` using the same URL.
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5. Apply the rendering rule to the new raster using `imageServiceRaster.setRenderingRule(renderingRuleInfo)`.
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6. Create a `RasterLayer` from the raster for display.
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## Relevant API
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* ImageServiceRaster
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* RasterLayer
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* RenderingRule
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## About the data
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This raster image service contains 9 LAS files covering Charlotte, North Carolina's downtown area. The lidar data was collected in 2007. Four Raster Rules are available for selection: None, RFTAspectColor, RFTHillshade, and RFTShadedReliefElevationColorRamp.
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## Additional information
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Image service rasters of any type can have rendering rules applied to them; they need not necessarily be elevation rasters. See the list of [raster function objects](https://developers.arcgis.com/documentation/common-data-types/raster-function-objects.htm) and syntax for rendering rules in the *ArcGIS REST API* documentation.
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## Tags
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raster, rendering rules, visualization

‎Shared/Samples/Apply raster rendering rule/README.metadata.json‎

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{
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"category": "Visualization",
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"description": "Display a raster on a map and apply different rendering rules to that raster.",
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"ignore": false,
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"images": [],
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"keywords": [
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"raster",
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"rendering rules",
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"visualization",
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"ImageServiceRaster",
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"RasterLayer",
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"RenderingRule"
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],
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"redirect_from": [],
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"relevant_apis": [
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"ImageServiceRaster",
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"RasterLayer",
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"RenderingRule"
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],
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"snippets": [
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"ApplyRasterRenderingRuleView.swift"
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],
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"title": "Apply raster rendering rule"
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}

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