# GLHYMPS Porosity (`GLHYMPS_Porosity_1km_WGS84_UINT8`) — 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 Porosity - **Slug**: `GLHYMPS_Porosity_1km_WGS84_UINT8` - **Units**: `Relative Porosity Index` - **Spatial Extent**: UL(89.9835615, -179.9999889) to LR(-89.9991237, 179.9989201) - **Summary**: The GLHYMPS Porosity raster represents the estimated relative porosity of near-surface geologic materials derived from the GLHYMPS global hydrogeology framework. Porosity describes the proportion of void space within geologic materials and is an important control on groundwater storage potential, aquifer capacity, groundwater persistence, and artesian system development. Higher values indicate geologic materials with greater groundwater storage potential, while lower values indicate more compact, crystalline, or low-storage hydrogeologic settings. This raster is used as a supporting hydrogeologic layer 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))` - `(0.1, (208.5, 178.0, 138.0))` - `(0.2, (207.0, 176.0, 136.0))` - `(0.30000000000000004, (205.5, 174.0, 134.0))` - `(0.4, (204.0, 172.0, 132.0))` - `(0.5, (202.5, 170.0, 130.0))` - `(0.6000000000000001, (201.0, 168.0, 128.0))` - `(0.7000000000000001, (199.5, 166.0, 126.0))` - `(0.8, (198.0, 164.0, 124.0))` - `(0.9, (196.5, 162.0, 122.0))` - `(1.0, (195.0, 160.0, 120.0))` - `(1.0, (195.0, 160.0, 120.0))` # GLHYMPS Porosity **Global | ~1 km Resolution | Version 1** --- ## Raster Name GLHYMPS Porosity --- ## File Name `GLHYMPS_Porosity_1km_WGS84.tif` --- ## S3 Location `s3://aiq-file-storage/Artesian_Wells/GLHYMPS_Porosity_1km_WGS84.tif` --- ## Short Description The GLHYMPS Porosity raster represents the estimated relative porosity of near-surface geologic materials derived from the GLHYMPS global hydrogeology framework. Porosity describes the proportion of void space within geologic materials and is an important control on groundwater storage potential, aquifer capacity, groundwater persistence, and artesian system development. Higher values indicate geologic materials with greater groundwater storage potential, while lower values indicate more compact, crystalline, or low-storage hydrogeologic settings. This raster is used as a supporting hydrogeologic layer within the Global Artesian Well Likelihood Framework. --- ## Units of Measure Relative Porosity Index --- ## Technical Specification This raster was derived from GLHYMPS porosity attributes and processed into a globally consistent ~1 km raster layer. The dataset was reprojected to WGS84 for web map rendering, API query services, and enterprise GIS deployment. The porosity raster supports the artesian model by helping identify geologic environments capable of storing groundwater and sustaining aquifer systems. --- ## Model Role Within Artesian Framework The GLHYMPS Porosity raster contributes to the hydrogeologic component of the Artesian Well Likelihood Framework. The raster helps characterize: - groundwater storage potential - aquifer capacity - pore-space availability - groundwater persistence - sedimentary and unconsolidated terrain favorability Porosity is especially useful when interpreted together with hydraulic conductivity and transmissivity. High porosity alone does not necessarily indicate high groundwater flow, but when combined with favorable permeability and transmissivity, it strengthens the likelihood of productive or persistent groundwater systems. --- ## Interpretation Guidance | Relative Value | General Interpretation | |---|---| | Very Low | Limited groundwater storage potential | | Low | Low pore-space availability | | Moderate | Moderate groundwater storage potential | | High | Favorable aquifer storage conditions | | Very High | Strong groundwater storage potential | --- ## Hydrogeologic Significance Higher porosity values commonly correspond with: - unconsolidated sediments - alluvial deposits - sedimentary basins - carbonate systems - weathered or porous geologic materials Lower porosity values commonly correspond with: - crystalline basement - metamorphic terrains - compact igneous rocks - dense bedrock systems - low-storage hydrogeologic environments --- ## Spatial Characteristics | Property | Value | |---|---| | Coverage | Global | | Resolution | ~1 km | | Coordinate System | GCS_WGS_1984 | | Projection | EPSG:4326 | | Pixel Type | 32-bit Float or normalized raster index | --- ## 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 - porosity attribute extraction - geometry repair and projection - rasterization to ~1 km global grid - normalization and harmonization - reprojection to WGS84 - GeoTIFF export for web rendering and API deployment --- ## Related Hydrogeologic Rasters - [GLHYMPS Hydraulic Conductivity (logK)](https://secure.engineeringdirector.com/public/map/GLHYMPS_Hydrogeology_Constraint_1km_WGS84_UINT8) - [GLHYMPS Transmissivity](https://secure.engineeringdirector.com/public/map/GLHYMPS_Transmissivity_1km_WGS84_UINT8_v3) - [GLHYMPS Hydrogeology Constraint](https://secure.engineeringdirector.com/public/map/GLHYMPS_Hydrogeology_Constraint_1km_WGS84_UINT8) - [GLiM Lithology Constraint](https://secure.engineeringdirector.com/public/map/GLiM_Lithology_Constraint_1km_WGS84_UINT8) --- ## Related Artesian Framework Layers - [Artesian Well Likelihood (1–100)](https://secure.engineeringdirector.com/public/map/Artesian_Well_Likelihood_1km_Industry_Filled_webfile) - [Artesian Well Likelihood Index (1–5)](https://secure.engineeringdirector.com/public/map/Artesian_Well_Likelihood_Class_1km_Industry_Filled_webfile) --- ## Intended Applications This raster is intended for: - hydrogeologic screening - groundwater storage assessment - artesian likelihood modeling - aquifer favorability analysis - infrastructure planning - pipeline corridor assessment - enterprise GIS and API workflows --- ## Limitations This raster represents generalized porosity conditions at approximately 1 km resolution and should not be interpreted as: - site-specific measured porosity - aquifer yield prediction - groundwater depth prediction - hydraulic head prediction - direct artesian well occurrence - engineering-scale hydrogeologic characterization Local hydrogeologic conditions may vary substantially due to lithologic heterogeneity, fractures, weathering, confinement, and subsurface stratigraphy. Site-specific hydrogeologic investigation remains necessary for engineering or groundwater development decisions. --- ## Confidence Statement The GLHYMPS Porosity raster provides a globally consistent hydrogeologic storage indicator that improves interpretation of groundwater-bearing terrain within the Artesian Well Likelihood Framework. It is best used as a supporting layer alongside hydraulic conductivity, transmissivity, lithology, and terrain hydrology. --- ## Data Access & API Services Available through Engineering Director platforms for: - interactive mapping - API integration - enterprise GIS - bulk scoring workflows - hydrogeologic screening --- ## 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 and processing workflows are proprietary. --- ## Dataset Citation Mazzella, J. (2026). **GLHYMPS Porosity, Global 1 km Hydrogeologic Raster Framework.** AtmosphericIQ LLC / Engineering Director, Inc. --- ## 2. How to Create an Account, Log In & Query Coordinates ### Step 1: Register with User Email (`POST https://secure.engineeringdirector.com/api/v1/agent/register`) or Sign In at `https://secure.engineeringdirector.com/login` Zero-signup queries are disabled. 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