Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://developers.arcgis.com/qt/cpp/sample-code/raster-layer-file/ below:

Raster layer (file) | ArcGIS Maps SDK for Qt

View on GitHub Sample viewer app

Create and use a raster layer made from a local raster file.

Rasters can be digital aerial photographs, imagery from satellites, digital pictures, or even scanned maps. An end-user will frequently need to import raster files acquired through various data-collection methods into their map to view and analyze the data.

The sample will load with a map showing a basemap and a loaded raster layer. Tap on "Add Raster" to browse for a new raster file. On desktop platforms the sample also allows you to drag and drop supported raster files to load.

1. Create a Raster from a raster file.
2. Create a RasterLayer from the raster.
3. Add it as an operational layer with map::operationalLayers()::append(rasterLayer).

• Raster
• RasterLayer

Read more about how to set up the sample's offline data here.

See the topic What is raster data? in the ArcMap documentation for more information about raster images.

data, image, import, layer, raster, visualization

RasterLayerFile.cpp RasterLayerFile.cpp RasterLayerFile.h RasterLoader.qml RasterLayerFile.qml

Use dark colors for code blocks Copy

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
// [WriteFile Name=RasterLayerFile, Category=Analysis]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD

// sample headers
#include "RasterLayerFile.h"

// ArcGIS Maps SDK headers
#include "Basemap.h"
#include "Envelope.h"
#include "Error.h"
#include "LayerListModel.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MapTypes.h"
#include "MapViewTypes.h"
#include "Point.h"
#include "Raster.h"
#include "RasterLayer.h"

// Qt headers
#include <QFuture>
#include <QStandardPaths>
#include <QUrl>
#include <QtCore/qglobal.h>

using namespace Esri::ArcGISRuntime;

// helper method to get cross platform data path
namespace
{
  QString defaultDataPath()
  {
    QString dataPath;

  #ifdef Q_OS_IOS
    dataPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
  #else
    dataPath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
  #endif

    return dataPath;
  }
} // namespace

RasterLayerFile::RasterLayerFile(QQuickItem* parent /* = nullptr */):
  QQuickItem(parent)
{
}

RasterLayerFile::~RasterLayerFile() = default;

void RasterLayerFile::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<RasterLayerFile>("Esri.Samples", 1, 0, "RasterLayerFileSample");
}

void RasterLayerFile::componentComplete()
{
  QQuickItem::componentComplete();

  const QString dataPath = defaultDataPath() + "/ArcGIS/Runtime/Data/raster/";

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");
  m_mapView->setWrapAroundMode(WrapAroundMode::Disabled);

  Basemap* basemap = new Basemap(BasemapStyle::ArcGISImageryStandard, this);
  m_map = new Map(basemap, this);
  m_mapView->setMap(m_map);

  // Create a map using a raster layer
  createAndAddRasterLayer(dataPath + "Shasta.tif");
}

void RasterLayerFile::createAndAddRasterLayer(QString dataPath)
{
  // correct data path if contains file:/ prefix
  if (dataPath.contains("file:/"))
    dataPath = QString(QUrl(dataPath).toLocalFile());

  //! [RasterLayerFile cpp new raster layer]
  Raster* raster = new Raster(dataPath, this);
  RasterLayer* rasterLayer = new RasterLayer(raster, this);
  //! [RasterLayerFile cpp new raster layer]

  connect(rasterLayer, &RasterLayer::doneLoading, this, [this, rasterLayer](const Error& loadError)
  {
    if (!loadError.isEmpty())
      return;

    m_mapView->setViewpointCenterAsync(rasterLayer->fullExtent().center(), 80000);
  });

  m_map->operationalLayers()->clear();
  m_map->operationalLayers()->append(rasterLayer);
}

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4