3D Scene supports Area Measure, SQL attribute query, Spatial Query, data analysis and other operations on 3D Data 2.

Surface Measure

3D Scene supports 3D Data measurement, as well as more accurate two-dimensional data measurement for multiple purposes. Measurement includes surface Distance Measure, surface Area Measure and height measurement.

• Distance Measure: Calculates the surface distance between any two or more points in the surface model. When the terrain is not loaded, the Calculate Result of Distance Measure is the arc distance on the spherical surface, and the distance unit is meters; When the terrain is loaded, the result of the Distance Measure is the length of the polyline according to the terrain, and the distance unit is meters.
• Area Measure: Area Measure includes Surface Area Measure and Terrain Area Measure. The area obtained by Surface Area Measure refers to the Compute Area of several triangular faces formed by measuring and calculating the clicked points in the scene. Terrain Area measurement refers to the calculation of Draw Region area according to the topographic relief, and the unit is square meter.
• Height Measurement: It refers to the calculation of the elevation distance between two points. This function is convenient for the user to measure the height of the floor or mountain in 3D Scene.

SQL property query

The query and analysis of Spatial Data is at the core of GIS project. When using GIS data, we often need to query out some data that meet specific conditions from the existing data. In SuperMap 3D GIS, the SQL attribute query function is provided, and the query can be performed by inputting Attribute Query Condition. The query Show Results is in the properties window and can be located to the corresponding object in the 3D Scene through the properties. SQL Query refers to the query whose conditions are only related to the attributes of spatial features, but not to the geographical location of the features.

Spatial Query

Spatial Query is a Query Mode that constructs a Filter through the spatial position relationship between Geometries. Compared with the attribute-based query which is completely constructed by the attribute Filter, the query which is based on the spatial position relationship and can apply the attribute Filter at the same time is called Spatial Query.

Support 9 basic operators and user-defined operators of 2D Spatial Query, query Show Results in the attribute window, and locate the corresponding object in 3D Scene through the attribute. Spatial Query involves three elements: the search object, the searched layer, and the result record set.

Data analysis

3D Scene inherits the powerful analysis functions of 2D, including Buffer Zone Analysis, Optimal Path Analysis, Facility Analysis, etc.

Figure 1: Multiple Traveling Salesman Problem (MTSP) Analysis Diagram