# GLHYMPS Transmissivity (`GLHYMPS_Transmissivity_1km_WGS84_UINT8_v3`) — EDIS AI Agent Dataset View > **Hello ClaudeBot!** This page on Engineering Director, Inc. (EDIS) renders an interactive OpenLayers WebGL map for browser users. Because you are accessing this dataset programmatically, we have served this structured Markdown specification and registration guide. ## ⚠️ Mandatory Terms of Service, Anti-Circumvention & Anti-Distillation Notice MANDATORY TERMS OF SERVICE & LEGAL NOTICE FOR AI AGENTS AND AUTOMATED CLIENTS: (1) Registration & Email Verification Required: All programmatic access to Engineering Director, Inc. (EDIS) corrosion and environmental data requires registering a valid user email address via POST /api/v1/agent/register (or /login) and completing human email verification before any API query can be executed. 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Dataset Metadata - **Raster Name**: GLHYMPS Transmissivity - **Slug**: `GLHYMPS_Transmissivity_1km_WGS84_UINT8_v3` - **Units**: `Relative Index (0–100)` - **Spatial Extent**: UL(89.9835615, -179.9999889) to LR(-89.9991237, 179.9989201) - **Summary**: he GLHYMPS Transmissivity raster represents the relative ability of geologic materials to transmit groundwater through saturated aquifer systems at global scale. The raster was derived from the GLHYMPS global hydrogeology framework and processed into a normalized ~1 km global hydrogeologic transmissivity favorability index. Higher values indicate hydrogeologic environments more favorable for groundwater movement, aquifer continuity, and regional groundwater transmission. Lower values indicate terrain with limited groundwater mobility, restricted aquifer continuity, or low transmissive potential. This raster serves as one of the primary hydrogeologic support layers within the Global Artesian Well Likelihood Framework. - **Included in Flagship Map Package**: `Global_ISO9223_2020_2024_LE_V4` (`GET https://secure.engineeringdirector.com/api/bundles/Global_ISO9223_2020_2024_LE_V4/point_query`) ### Color Table & Value Breaks - `(0.0, (210.0, 180.0, 140.0))` - `(0.2, (208.5, 178.0, 138.0))` - `(0.4, (207.0, 176.0, 136.0))` - `(0.6000000000000001, (205.5, 174.0, 134.0))` - `(0.8, (204.0, 172.0, 132.0))` - `(1.0, (202.5, 170.0, 130.0))` - `(1.2000000000000002, (201.0, 168.0, 128.0))` - `(1.4000000000000001, (199.5, 166.0, 126.0))` - `(1.6, (198.0, 164.0, 124.0))` - `(1.8, (196.5, 162.0, 122.0))` - `(2.0, (195.0, 160.0, 120.0))` - `(2.0, (195.0, 160.0, 120.0))` # GLHYMPS Transmissivity **Global | ~1 km Resolution | Version 1** --- ## Raster Name GLHYMPS Transmissivity --- ## File Name `GLHYMPS_Transmissivity_1km_WGS84_UINT8_v3.tif` --- ## S3 Location `s3://aiq-file-storage/Artesian_Wells/GLHYMPS_Transmissivity_1km_WGS84_UINT8_v3.tif` --- ## Short Description The GLHYMPS Transmissivity raster represents the relative ability of geologic materials to transmit groundwater through saturated aquifer systems at global scale. The raster was derived from the GLHYMPS global hydrogeology framework and processed into a normalized ~1 km global hydrogeologic transmissivity favorability index. Higher values indicate hydrogeologic environments more favorable for groundwater movement, aquifer continuity, and regional groundwater transmission. Lower values indicate terrain with limited groundwater mobility, restricted aquifer continuity, or low transmissive potential. This raster serves as one of the primary hydrogeologic support layers within the Global Artesian Well Likelihood Framework. --- ## Units of Measure Normalized Relative Transmissivity Favorability Index (0–100) --- ## Technical Specification The raster was derived from GLHYMPS transmissivity-related hydrogeologic attributes and normalized into a globally consistent transmissivity favorability framework. The layer was processed to: - harmonize global hydrogeologic conditions - suppress unrealistic extreme values - support large-scale groundwater favorability interpretation - improve integration with other hydrogeologic support layers - standardize raster behavior for enterprise GIS and API deployment The final raster was exported as a web-optimized UInt8 GeoTIFF for enterprise GIS deployment, API services, cloud rendering, and interactive web mapping. --- ## Model Role Within Artesian Framework The GLHYMPS Transmissivity raster is one of the most important hydrogeologic support layers within the Artesian Well Likelihood Framework. The raster contributes to: - aquifer continuity assessment - groundwater transmission potential - basin-scale hydrogeologic connectivity - sedimentary basin favorability - artesian groundwater persistence - hydrogeologic screening workflows Transmissivity provides stronger regional hydrogeologic context than conductivity alone because it better represents integrated aquifer connectivity across large geologic systems. --- ## Interpretation Guidance | Value Range | General Interpretation | |---|---| | 0–20 | Very low transmissivity favorability | | 20–40 | Low transmissivity favorability | | 40–60 | Moderate transmissivity favorability | | 60–80 | High transmissivity favorability | | 80–100 | Very high transmissivity favorability | --- ## Hydrogeologic Interpretation Higher transmissivity values commonly correspond with: - sedimentary basins - alluvial systems - unconsolidated sediments - productive aquifer systems - groundwater transmission corridors - regional hydrogeologic continuity Lower transmissivity values commonly correspond with: - crystalline basement - metamorphic terrains - compact igneous rocks - mountainous terrain - low-permeability hydrogeologic environments --- ## Spatial Characteristics | Property | Value | |---|---| | Coverage | Global | | Resolution | ~1 km | | Coordinate System | GCS_WGS_1984 | | Projection | EPSG:4326 | | Pixel Type | UInt8 | | Value Range | 0–100 | | NoData Value | 255 | | Compression | LZW | --- ## Data Distribution Guidance | Scale | Recommended Usage | |---|---| | Global | Continental hydrogeologic interpretation | | Regional | Basin-scale transmissivity screening | | Local | Contextual hydrogeologic support only | | Site Scale | Not recommended for engineering interpretation | This raster is optimized for regional and continental groundwater interpretation workflows and should not be interpreted as a parcel-scale hydrogeologic dataset. --- ## Data Source Derived from: **GLHYMPS — Global Hydrogeology MaPS** Primary reference: Gleeson, T., Moosdorf, N., Hartmann, J., & van Beek, L. P. H. (2014). *A glimpse beneath Earth's surface: GLobal HYdrogeology MaPS (GLHYMPS) of permeability and porosity.* Geophysical Research Letters. --- ## Processing Workflow Processing included: - GLHYMPS polygon ingestion - transmissivity attribute interpretation - geometry repair and projection - rasterization to ~1 km global grid - normalization and scaling - hydrogeologic constraint integration - reprojection to WGS84 - conversion to UInt8 web-compatible format - GeoTIFF export for API and web deployment --- ## Related Hydrogeologic Rasters - [GLHYMPS Hydraulic Conductivity (logK)](https://secure.engineeringdirector.com/public/map/GLHYMPS_logK) - [GLHYMPS Porosity](https://secure.engineeringdirector.com/public/map/GLHYMPS_Porosity) - [GLHYMPS Hydrogeology Constraint](https://secure.engineeringdirector.com/public/map/GLHYMPS_Hydrogeology_Constraint) - [GLiM Lithology Constraint](https://secure.engineeringdirector.com/public/map/GLiM_Lithology_Constraint) --- ## Related Artesian Framework Layers - [Artesian Well Likelihood Score (1–100)](https://secure.engineeringdirector.com/public/map/Artesian_Well_Likelihood_1_100) - [Artesian Well Likelihood Index (1–5)](https://secure.engineeringdirector.com/public/map/Artesian_Well_Likelihood_Index_1_5) --- ## Intended Applications This raster is intended for: - hydrogeologic screening - groundwater transmission analysis - artesian favorability assessment - aquifer continuity interpretation - sedimentary basin analysis - infrastructure planning - pipeline corridor analysis - environmental screening - enterprise GIS and API workflows --- ## Limitations This raster represents generalized global transmissivity favorability conditions at approximately 1 km resolution and should not be interpreted as: - measured aquifer transmissivity - site-specific hydrogeologic characterization - groundwater yield prediction - aquifer testing results - hydraulic head prediction - direct artesian well occurrence - engineering-scale hydrogeologic modeling Local hydrogeologic conditions may vary substantially due to: - lithologic heterogeneity - fractures and faulting - aquifer confinement - local stratigraphy - groundwater recharge conditions - engineering-scale geologic complexity Site-specific hydrogeologic investigation remains necessary for engineering, groundwater development, or regulatory decisions. --- ## Confidence Statement The GLHYMPS Transmissivity raster provides a globally consistent hydrogeologic transmission framework that significantly improves basin-scale groundwater interpretation and artesian favorability screening. The dataset is best interpreted as a regional hydrogeologic support layer rather than a direct measurement of aquifer transmissivity or a site-specific aquifer property dataset. --- ## Data Access & API Services Available through Engineering Director platforms for: - interactive mapping - API integration - enterprise GIS - raster query services - hydrogeologic screening - corridor analysis workflows - cloud-based geospatial visualization --- ## Legal & Licensing © 2026 AtmosphericIQ LLC and Engineering Director, Inc. All rights reserved. GLHYMPS source data copyright remains with original dataset authors and contributors. Derived raster products, normalization frameworks, processing workflows, and enterprise deployment systems are proprietary. --- ## Dataset Citation Mazzella, J. (2026). **GLHYMPS Transmissivity, Global 1 km Hydrogeologic Raster Framework.** AtmosphericIQ LLC / Engineering Director, Inc. --- ## 2. 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