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This definitive collection of prompts for Geographic Information Systems (GIS) represents the most advanced resource for professionals in geomatics, cartography and spatial analysis. Designed with a rigorous technical approach, it allows you to optimize complex workflows, from advanced geoprocessing to satellite remote sensing, guaranteeing millimeter precision in each query and automated process. By integrating these prompts into their work environment, specialists will be able to accelerate decision-making based on geospatial data, solve intricate topological challenges, and master industry-leading tools. It is the ideal strategic investment to convert geographic information into actionable knowledge of high corporate and scientific value.
He acts as a Senior Specialist in Hydrology and Geographic Information Systems (GIS) with extensive experience in applied geomorphometry. Your main task is to develop a comprehensive technical protocol to execute the flow 'Accumulation Calculation' process, using as a basis a Digital Elevation Model (DEM) with a resolution of [DEM Resolution] meters. The analysis must be carried out on the study area located in [Geographic Location], guaranteeing that all data are projected in the coordinate system [Coordinate Reference System]. The workflow must necessarily start with a topological pre-processing phase. Details the procedure to identify and correct spurious depressions (sinks/pits) using the [Filling Algorithm, e.g. Wang and Liu], explaining why sump filling is critical to avoid artificial interruption of water flow in digital models. Ensure that the resulting MDE is hydrologically consistent before proceeding to any derived calculations, minimizing alteration of the original elevation values outside of the detected depressions. Next, develop the step for generating the 'Flow Direction' layer. Compare and justify the use of the method [Direction Method, e.g. D8 or D-Infinity] depending on the complexity of the terrain. If the terrain is rugged, method D8 will be preferable for its deterministic simplicity; If the aim is to model dispersed flows on gentle slopes, it argues for the advantages of D-Infinity. This step is essential, since flow accumulation depends directly on how water moves from one cell to its immediate neighbors following the maximum slope. Subsequently, it describes the process of calculating the 'Flow Accumulation' matrix. It explains mathematically how each cell receives the cumulative value of all the cells draining into it, creating an ascending area contribution gradient. It is vital that you mention the use of an optional weights layer if the user wishes to model variables such as infiltration or differentiated precipitation. The final result should be a raster where the highest values represent the main drainage axes and the low values represent the watersheds (interfluves). Finally, it establishes the criteria for the extraction of the synthetic drainage network through the use of map algebra. Defines a critical threshold of [Accumulation Threshold] pixels or area in square kilometers to discriminate between diffuse surface runoff and permanent or seasonal channels. The final product must be a vector layer of hierarchical drainages under the system of [Classification Method, e.g. Strahler or Shreve], ready for integration into flood models or territorial planning. If any key information needed to fill the bracketed fields is missing, ask me the necessary questions before answering.
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Acts as a Geomatics Engineer expert in digital hydrology and geographic information systems (GIS). Your mission is to generate a high-precision technical protocol for the delimitation, extraction and analysis of [Drainage Networks] based on a Digital Elevation Model (DEM) with a spatial resolution of [DEM Resolution] meters. The analysis must be specifically designed to be executed in the [Main GIS Software] environment and must consider the topographic and climatic particularities of the study area located in [Geographical Location]. The workflow must necessarily begin with the hydrological correction phase of the DEM, detailing the elimination of spurious depressions (sinks) and peaks (peaks) using the [Preprocessing algorithm], ensuring that the model is hydrologically consistent to guarantee the continuity of surface flow throughout the basin. Subsequently, it describes with technical rigor the calculation of the flow direction matrix using the method [Flow direction algorithm (D8, D-Inf, Rho8)]. Once the direction is obtained, proceed to detail the generation of the flow accumulation layer (Flow Accumulation), establishing a critical threshold of [Accumulation threshold] pixels or minimum drained area to define the beginning of the channels. It is essential that you explain how the variation of this threshold directly impacts the drainage density and the sensitivity of the model to detect first-order water courses, comparing the theoretical results with the geomorphological reality of the terrain. The next step consists of the hierarchization and vectorization of the river network. You must apply the ordination methods of [Classification Method (Strahler or Shreve)], justifying in detail which of these approaches is the most appropriate for the analysis of the magnitude and structural complexity of the basin in question. It includes instructions for converting the resulting raster model to a polyline vector format, ensuring that the attributes of order, length, mean slope of each reach, and upstream contributing area are preserved. The entire procedure must be carried out under the coordinate reference system [EPSG Coordinate System] to guarantee precision in linear and surface measurements. Finally, it integrates an advanced morphometric analysis that includes the calculation of the sinuosity of the main channels, the concentration time of the basin using the [Concentration time formula] formula and the total drainage density (Km/Km²). The final output generated by this workflow should consist of a technical report that presents accumulation maps, longitudinal profiles of the channels and a statistical validation of the extracted network against official water networks or remote sensing data. This prompt is designed to be the basis of a professional water resources management, flood modeling or precision territorial planning project. If any key information needed to fill the bracketed fields is missing, ask me the necessary questions before answering.
He acts as a senior consulting engineer specializing in Geomatics and Geographic Information Systems (GIS) with extensive experience in processing complex geospatial data. Your task is to design and execute an advanced technical workflow for the generation and analysis of [MODEL_TYPE: MDE, MDT or MDS] applied specifically to the [APPLICATION_INDUSTRY: e.g. e.g., Civil Engineering, Hydrology, Urban Planning]. The main objective is to transform a point cloud or raw raster data from [DATA_SOURCE: LiDAR, UAV Photogrammetry, Satellite] into a high-fidelity cartographic product that serves as a basis for [SPECIFIC_PROJECT]. The process begins by detailing the preprocessing and data cleaning phase. You must establish rigorous criteria for noise removal, point classification (especially to distinguish between soil and vegetation/buildings), and correction of systematic errors in the capture. Justify the choice of the most appropriate interpolation method (Kriging, IDW, Spline or Delaunay Triangulation) based on the homogeneity of the sample and the morphology of the terrain in the study area, ensuring that the pixel resolution (GSD) is consistent with the work scale required for [SPECIFIC_PROJECT]. Subsequently, develop a three-dimensional surface analysis that includes the generation of critical derivative products. This should cover the calculation of slopes (slope) in percentages or degrees, the orientation of slopes (aspect), the analytical shading (hillshade) for morphological visualization and the analysis of curvature (profile and plan). If the project is of a water nature, it must integrate the 'Hydrological Conditioning' process (filling of sinks and elimination of peaks) to guarantee that the model is suitable for water flow simulations and basin delimitation using D8 or Rho8 algorithms. Finally, it establishes a vertical and horizontal precision validation protocol. Compare the results obtained with [NUMBER_CONTROL_POINTS] ground control points (GCP) collected using GNSS-RTK methods. Calculates the Root Mean Square Error (RMSE) and generates a discrepancy report that determines whether the model meets international standards for cartographic accuracy [QUALITY_STANDARD: p. e.g., ASPRS or NMAS]. The final output should include recommendations on exporting the model in optimized formats such as GeoTIFF, Cloud Optimized GeoTIFF (COG) or formats compatible with BIM environments (IFC). If any key information needed to fill the bracketed fields is missing, ask me the necessary questions before answering.
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