Map Measurement

Used to measure the distance, area, or angle between points to be measured on a map. For Raster Data, measuring Surface Distance, Surface Area, or Surface Volume is also supported.

When measuring, users can turn on the Capture function to obtain the position of the point to be measured more accurately.

Illegal face does not support Map Measurement.

Function entrance

Map tab-> Operation group.

Unit

It is recommended to set the unit of measurement and calculation before measurement and calculation. Click the Map tab-> Operation-> Unit button, and set the units of distance, area and angle in the pop-up dialog box.

Provide Automatic Convertsion Unit, and the measurement and calculation results will be automatically converted in their respective systems. For example, if the current measurement unit is decimeter, when the measurement result is Greater than or equal to 10 decimeter, the result will be displayed in meter; when the measurement result is Greater than or equal to 1000 meter, the result will be displayed in kilometer.

Distance Measure

Distance Measure includes straight line, geodesic line and Surface Distance:

Straight-line Distance refers to the Horizontal distance between any two points on the map in a flat two-dimensional space, regardless of the curvature of the earth.
Geodesic Distance refers to the length of the shortest line between any two points in the map on the surface of the ellipsoid (ellipsoid). For example, it can be used to measure the Shortest Path distance between two city airports as a flight route. The SmLength field in the
properties table and the Length value in the Object Properties also take the geodesic Calculator Method.
Surface Distance refers to the distance of the topographical surface measured along the specified line segment or polyline segment on the 3D surface fitted by Raster Data in the map. Surface Distance measures the distance on the surface, which is greater than straight-line distance and the geodesic distance.

Take the Straight-line Distance measurement operation as an example to introduce how to complete the Distance Measure:

Select the Straight-line Distance option from the Map Measurement drop-down list, and the mouse status in the current Map becomes a crosshair.
Click the left mouse button at the starting point of the Measure Distance to determine the starting point of the Measure Distance; move the mouse, and a temporary line segment with changing length connecting the current point of the mouse and the starting point will appear on the screen, and the distance value of this line segment will also be displayed.
Move Stop by Mouse to the location of the second measurement point and click the left mouse button to determine the second point.
Caution:
In the process of
measurement, Map will display two result values at the same time: the length of the line segment between the current mouse point and the previous point and the total length of the line segment between the current mouse point and the start point of Measure Distance.
- the mouse clicks the second point, the two values displayed in the Map are equal;
- When the mouse clicks the second point, move the mouse, and the two values displayed in Map will change (not equal);
- current mouse point and the previous point is always less than total length of the line segment between the current mouse point and the start point.
Repeat step 3 to add the remaining measurement points. After adding the end point, complete the measurement operation with the right mouse button.

Area Measure

Area Measure includes plane area and Surface Area . Surface Area refers to the Surface Area for measuring and calculating the fitting surface of Raster Data. The following takes the plane Area Measure as an example for illustration:

Select the Area option in the Map Measurement drop-down and the mouse status in the current Map becomes a crosshair.
In the current Map, click the position of the area boundary of the Area to be measured to determine the starting point of the Area Measure.
Click the left mouse button along the inflection point of the boundary line of the area to be Measured. Draw the second point of the Polygon.
Repeat the third step and click the right mouse button to complete the drawing of the polygon.

Angle Measure

Used to measure the value of the included angle of the continuous line segment.

Select the Angle option from the Map Measurement drop-down and the mouse status in the current Map becomes a crosshair.
In the current Map, click any point on one side of the Angle Measure to be measured with the left mouse button as the starting point of the Angle Measure, and a dotted line pointing to the true north is formed at the point. Move the mouse to form a ray from the starting point, and the included angle between the ray and the dotted line in the true north direction is displayed. The azimuth angle of the ray.
Use the left mouse button to select the vertex to be Angle Measured to determine an edge. Move the mouse to draw a ray from the second mouse point and form an angle with the first edge. Two Angle Measure values are displayed: the angle of the ray from the first edge and the azimuth of the ray.
Click any point on the other side of the Angle Measure with the left mouse button, and complete the Angle Measure with the right mouse button. The angle value of a plurality of continuous lines can be continuously measured.

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