Data Collection

iMobile provides the function of creating various geometric objects on the map, including: point object, line object, face object, and graffiti. The collection of various geometric objects is carried out in the state that the layer can be edited. iMobile does not support multiple layers to edit. If multiple layers can be edited at the same time, when collecting points, lines, surfaces or graffiti objects, only the objects are collected for the last set layer.

Hand-painted collection

The jar packages required for hand-painted collection are com.supermap.data.jar, com.supermap.mapping.jar, and the required so libraries are libimb2d.so, libgnustl_shared.so, libQt5Core.so, libQt5Gui.so, libQt5Svg.so, libQt5Widgets.so.

The key categories and methods are as follows:

Class	Method
MapControl	setAction()、redo()、undo()、submit()
Layer	setVisible()、setEditable()
Action	CREATEPOINT、CREATEPOLYLINE、DRAWLINE、CREATEPOLYGON、DRAWPLOYGON、FREEDRAW

Point object collection

In GIS applications, common point objects describe some point-like objects, such as elevation control points, mines, caves, etc.

Action "CREATEPOINT" of point objects supports drawing point objects in the currently editable point layer or CAD layer.

Figure: Point object collection

Implementation steps:

Step 1: Set up before drawing

// Set that the layer can be displayed, true, mean that the layer can be displayed, false, mean that the layer is not displayed.
layer. setVisible (true);
// Set the layer editable, true, indicating that the vector layer is editable, andfalse, indicating that the vector layer is not editable.
layer.setEditable(true);
// Set the object operation type to the click-based drawing point object
mapControl.setAction(Action.CREATEPOINT);

Step 2: Interactive drawing points on the device

Click the drawing point object with a single finger on the mobile device.

Step 3: Submit the drawing

mapControl.submit();

Line object collection

In GIS applications, common line objects describe some strips, such as roads, railways, pipelines, wires, etc.

(1) Click-to-click drawing

Action "CREATEPOLYLINE" supports drawing line objects in the current editable line layer or CAD layer.

Figure: Click-to-click drawing line

Implementation steps:

Step 1: Settings before drawing

// Set the layer to be displayed, true, which means that the layer can be displayed, false, indicating that the layer is not displayed. 
 Layer. setVisible (true); 
 // Set the layer to be editable, true, means that the vector layer is editable, false, indicating that the vector layer is not editable. 
 layer.setEditable(true); 
 // Set the object operation type as a click-based drawing line object 
 mapControl.setAction(Action.CREATEPOLYLINE);

Step 2: Interactive drawing lines on the device

Click your finger on the mobile device to draw the line node.

Step 3: Submit Drawing

mapControl.submit();

(2) Freestyle drawing

Action "DRAWLINE" of free-drawing lines supports the drawing of free-line objects in the current editable line layer or CAD layer.

Figure: Freestyle drawing

Implementation steps:

Step 1: Settings before drawing

// Set the layer to display, true, means that the layer can be displayed, false, means that the layer is not displayed. 
 Layer. setVisible (true); 
 // Set the layer to be editable, true, indicating that the vector layer is editable, false, indicating that the vector layer is not editable. 
 layer.setEditable(true); 
 //Set the object operation type as a free drawing line object 
 mapControl.setAction(Action.DRAWLINE)

Step 2: Interactively draw free lines on the device

Touch the screen with your finger, move your finger to draw the free line, and lift your finger to complete the drawing of the free line.

Step 3: Submit Drawing

mapControl.submit();

Face object collection

GIS application, commonly used surface objects describe some blocks, such as administrative regions, soil, vegetation, lakes, etc., and can also represent some special types of surface objects geographically, such as islands, rings, enclaves, etc.

(1) Click-to-drawing

Click Action "CREATEPOLYGON" on the painted face to support the drawing of face objects in the current editable surface layer or CAD layer.

Figure: Click-to-click drawing surface

Implementation steps:

Step 1: Set up before drawing

//set that the layer can be displayed, true, which means that the layer can be displayed, and false means that the layer is not displayed. 
 Layer. setVisible (true); 
 // Set the layer to edit, true, to indicate that the vector layer is editable, false, to indicate that the vector layer is not editable. 
 layer.setEditable(true); 
 // Set the object operation type to click-drawing polygon objects 
 mapControl.setAction(Action.CREATEPOLYGON);

Step 2: Interactive drawing on the device

Finger click on the mobile device in turn to draw the surface node.

Step 3: Submit Drawing

mapControl.submit();

(2) Freestyle drawing

Action "DRAWPLOYGON" of free-painted face supports the drawing of free-face objects in the current editable surface layer or CAD layer.

Figure: Freestyle drawing surface

Implementation steps:

Step 1: Set up before drawing

//Set the layer to display, true, indicating that the layer can be displayed, andfalse, indicating that the layer is not displayed. 
 Layer. setVisible (true); 
 //Set the layer editable, true, indicating that the vector layer is editable, andfalse, indicating that the vector layer is not editable. 
 layer.setEditable(true); 
 //Set the object operation type to freely draw surface objects 
 mapControl.setAction(Action.DRAWPLOYGON)

Step 2: Interactively draw a free surface on the device

Touch the screen with your finger, move your finger to draw the free surface, and lift your finger to complete the drawing of the free surface.

Step 3: Submit drawings

mapControl.submit();

Graffiti

Action "FREEDRAW" for gritry supports graffiry operations in the currently editable CAD layer to create a graffili object.

Figure: Graffiti

Implementation steps:

Step 1: Settings before drawing

// Set the layer to display, true, means that the layer can be displayed, false, means that the layer is not displayed. 
 Layer. setVisible (true); 
 // Set the layer to be editable, true, indicating that the vector layer is editable, false, indicating that the vector layer is not editable. 
 layer.setEditable(true); 
 // Set the object operation type as a graffiti object 
 mapControl.setAction(Action.FREEDRAW)

Step 2: Interactive graffiti on the device

Touch the screen with your finger and move your finger to draw. Graffiti does not limit the position and number of graffiti. Before submission and drawing, it is regarded as a graffiti object.

Step 3: Submit Drawing

mapControl.submit();

For the above hand-painted collection operation, please refer to the sample code MapEdit.

GPS acquisition

iMobile supports GPS collection and realizes attribute collection. The required class libraries include com.supermap.data.jar, com.supermap.mapping.jar, and so libraries include libimb2d.so, libgnustl_shared.so, libQt5Core.so, libQt5Gui.so, libQt5Svg.so, libQt5Widgets.so.

The key categories and methods are as follows:

Class	Method
Collector	setDataset()、openGPS()、createElement()、setStyle()、setSingleTapEnable()、routeAnalyst()、startGuide()、addNaviInfoListene()、cleanPath()

//Fetch Data Capture Module 
 Collector = mMapControl.getCollector(); 
 // Store the data set of the collected object, which can be the point-line CAD type. 
 Dataset dataset = mMapControl.getMap().getLayers().get(0).getDataset(); 
 collector.setDataset(dataset); // Set the data set for storing captured data 
 collector.openGPS(); // Turn on GPS 
 collector.createElement(GPSElementType.LINE);//Create a specified type of collection object 
 // Style 
 GeoStyle geoStyle = new GeoStyle(); 
 com.supermap.data.Color color = new com.supermap.data.Color(110, 208, 254); 
 // Line color 
 geoStyle.setLineColor(color); 
 // Set the drawing style 
 collector.setStyle(geoStyle); 
 // Open the single-finger dot 
 collector.setSingleTapEnable(true);

For the above GPS collection, please refer to the sample code Collector.

Trajectory capture

iMobile provides trajectory collection capabilities, automatically removes abnormal position coordinates, and supports background operation. The necessary class libraries for trajectory acquisition include com.supermap.data.jar, com.supermap.mapping.jar, com.supermap.navigation.jar, com.supermap.track.jar, and the so library includes libimb2d.so. If you want to use Tencent location, you also need to add TencentLocationSdk_v7.1.7.jar and libtencentloc.so.

The key categories and methods are as follows:

Class	Method
Track	createDataset()、setDataset()、setMatchDatasets()、setDistanceInternal()、setTimeInternal()、startTrack()、stopTrack()

Step 1: Set trajectory capture parameters

Track m_Track = new Track(this); 
 m_Track.setCustomLocation(true); // Set the user's incoming GPS data 
 m_Track.setDistanceInterval(3); // Set the distance interval to 3 meters 
 m_Track.setTimeInterval(25); // Set the time interval to 25s 
 m_Track.setMatchDatasets(m_Map.getWorkspace().getDatasources().get("road").getDatasets()); // Set the dataset where the matching path is located 
 DatasetVector dataset = m_Track.createDataset(m_Datasource, datasetName); //Create a dataset 
 m_Track.setDataset(dataset); // Set the point data set to record the trajectory

Step 2: Start logging the trajectory and set the location data

m_Track.startTrack(); //Start record the trajectory 
 if(m_Track! = null){ // Set GPS data for trajectory recording 
 mPoint = new Point2D(gpsData.dLongitude, gpsData.dLatitude); 
 gpsData.dLongitude = mPoint.getX(); 
 gpsData.dLatitude = mPoint.getY(); 
 m_Track.setGPSData(gpsData); // Set GPS data. When settingCustomLocation(true), the data set is valid. 
 Count++; 
 } 
 If(50 == count){ 
 m_Map.refresh(); 
 Count = 0; 
 }

Step 3: Results Logging Trajectory

m_Track.stopTrack(); // Stop logging the trajectory

For the above trajectory collection, please refer to the sample code Track.