管道走廊地形稳定性
针对膨胀性蒙脱石与地表水分的通行带监测，在同一网格上对两期作差分。
沿走廊追踪膨胀性黏土与水分，让巡检队伍直奔真正发生位移的地面。
Right-of-way corridor: swelling smectite clay and surface moisture, differenced between two dates.
传感器看到什么
这个图层在寻找什么。
每种材料的实验室参考光谱，以及传感器波段间隔能捕捉到的部分。阴影区标示方法读取的范围。
它能发现什么
它检测什么。
| 材料 | 典型产出环境 | 可能的混淆因素 |
|---|---|---|
| Expansive Smectite Clays (Montmorillonite) | Pipeline rights-of-way crossing unstable slopes and shale formations | Dense standing grass cover in corridor ditches |
方法
工作原理。
输入校准反射率，每个像元都对照公开参考库进行拟合。
Corridor masking
The pipeline centreline is buffered to the width you specify and everything outside it is dropped before any layer is computed.
Clay and moisture band depths
Continuum-removed depths for the expansive 2:1 clays and for surface water. These are exact arithmetic on reflectance, so the same scene returns the same numbers every time.
Slope and aspect context
Steepness and aspect are carried alongside the spectral layers so a wet clay reading on a steep face reads differently from the same reading on a flat one. They are shown together, not fused into a safety factor.
Change between dates
Two dates are differenced on the same grid, with the scene-wide median offset surfaced so a change in illumination is not read as a change in ground. Comparing across sensors or across engines is refused.
技术规格
您得到什么，它在什么数据上运行。
所需环境条件
Method and checks are documented in Axine Applied Spectroscopy Paper #2 · Section 6.1.
适用边界
Reads the ground along the corridor, not the pipe. Wall condition is invisible to an optical sensor.
