Surface Analysis mainly generates new Dataset, such as isoline, slope, aspect and other data, to obtain more information reflecting the spatial characteristics and spatial pattern implied in the Source Data set.
The grid Surface Analysis function is a Based on the surface modle and obtain information or generate surface., mainly including the following contents:
About Surface Analysis
Describes the basics of the various Surface Analysis features provided by Application.
Isolines are extracted
An isoline is a smooth curve connecting adjacent points of equal value. Commonly used contour lines are: contour, isobath, isotherm, isobar, isohyet, and so on. By extracting the isoline, we can find the position where the values of elevation, temperature and precipitation are the same, and the distribution of the isoline can also show the steep and gentle areas of change.
Extract Isosurface
An isosurface is a surface consisting of adjacent isoline closures. The change of the isosurface can directly show the change between the adjacent isolines, such as elevation, temperature, precipitation, pollution or atmospheric pressure. Through Extract Isosurface, you can get the position with the same elevation, temperature and precipitation. The effect of the iso-surface distribution is the same as that of the iso-line distribution, which also reflects the changes on the grid surface.
Line-of-sight Analysis
SuperMap Line-of-sight Analysis includes Visibility Analysis and Viewshed Analysis. With Viewshed Analysis, you can generate a Raster Dataset that contains viewfields. Through Visibility Analysis, you can judge whether two or more points are visible, and get the visible line.
Slope Analysis
Calculates the slope value for the Raster Dataset.
Aspect Analysis
Calculates the aspect value for the Raster Dataset.
Fill and cut
The change in volume and area between two Raster datasets (Before Cut Fill and After Cut FillRaster Dataset) was calculated.
Surface Cut Fill
Mass haul calculation is performed for an area specified by the user.
Inverse Cut Fill
Calculates the post-mass cut elevation based on the specified Dataset Bounds to be mass cut and the given volume of fill or cut.
Surface Measure
Used to measure the distance, area, and volume of a grid surface.
Profile Analysis
The profile is used to show the change of elevation along the designated route, which has important reference value for the study of regional topography and project implementation. Profile Analysis is used to generate a profile along a line and get a collection of crosshatches and sample points.
Split DEM
Cut the original Raster Dataset into two new Raster Datasets through the drawn cutting lines, and keep the Spatial Range of the original Raster Data unchanged.
DEM curvature calculation
Calculates the curvature of DEM Raster Data surfaces, including Mean Curvature, Profile Curvatur, and Plane Curvature.
Find Extremum Value
The Find Extremum Value is used to find the extreme points in the specified area, including the maximum extreme point and the minimum extreme point.
Orthophoto 3D Image
The digital differential correction technology is used to obtain the reasonable sunshine intensity of the current point through the elevation of the surrounding adjacent grids, and the orthophoto image is corrected, and finally the Orthophoto 3D Image is obtained.
3D Hillshade Map
A grid map that reflects the undulation of the terrain by simulating the shadow of the actual surface. The gray value of each pixel is obtained by using the imaginary light source to illuminate the map and combining with the Slope Aspect information obtained by Raster Data. The gray value of the slope facing the light source is the highest, and the gray value of the slope facing away from the light source is lower, which is the shadow area, thus vividly representing the actual landform and topography of the grid.