Prompt Description

Here is a scientific flowchart: **Flowchart Description:** **Title:** Technical Roadmap for Soil Particle Size Inversion in Mining Areas Based on Multi-Angle Remote Sensing **Overall Layout:** Adopts a **left-to-right progressive flowchart** that includes **four main stages**. Each stage has key steps, clearly connected by arrows, reflecting the complete closed-loop logic of "**data-driven → mechanism modeling → index construction → quantitative inversion → results application**." **Stage 1: Multi-Angle Data Preprocessing and BRDF Feature Analysis** - Input: MODIS / MISR multi-angle remote sensing images + field-measured spectral data - Process: Data acquisition → Radiometric/geometric correction → Angle matching → Generation of multi-angle BRF dataset - Output: BRF image **Stage 2: BRDF Model Validation and Parameter Sensitivity Analysis** - Core: Hapke model validation - Process: Model fitting → Parameter inversion (single scattering albedo, roughness, etc.) → Sensitivity analysis - Tool Annotation: MATLAB - Output: Hapke parameter model accuracy assessment (R², RMSE), Hapke parameters **Stage 3: Spectral Index Construction and Screening** - Parallel Dual Paths: 1. **Traditional Index Calculation:** Calculate 7 indices such as NDVI, SAVI, and BI based on BRF data. 2. **New Index Construction:** Construct photometric parameter indices such as PPSI based on Hapke physical parameters. - Tool Annotation: Python batch processing - Convergence: Screen the "optimal index combination" through correlation analysis. **Stage 4: Particle Size Inversion Model Construction and Spatial Mapping** - Process: Input optimal index → Inversion model → Accuracy verification → Spatial pixel-by-pixel inversion - Tool Annotation: ArcGIS - Output: Spatial distribution map of soil particle size (sand/silt/clay content) **Overall Style Description:** - Adopts an **academic poster style** with professional color scheme (mainly blue-gray, with key nodes highlighted in orange/green). - The graphics are concise, using **modular boxes + connecting arrows**, with small icons for important steps (such as satellites, soil samples, charts, maps, etc.). - Appropriate **data flow diagrams** (dashed arrows) and **key tool/software logos** can be added to the diagram.