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Showing results for tags 'stratigraphy'.
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Dear GMS users, I have created my stratigraphy using “boreholes and horizons” method consists of four materials named “Alluvium (yellow)”, “Tertiary (pink)”, “Ophiolite (green)”, and “Hawasina (turquoise)” units. Horizon IDs are numbered for these units consecutively in the order that the strata are deposited (from the bottom up). So, the assigned horizon IDs for these “Alluvium”, “Tertiary”, “Ophiolite”, and “Hawasina” units are “4”, “3”, “2”, and “1”, respectively. Now, I want to map the generated stratigraphy (solid) to the 3D grid using the “Boundary Matching” option. I could not find any more documents about the theory / concept of this method except of “GMS; MODFLOW-Generating Data from Solids” tutorial. The main question is about the number of layers in the 3D grid and how we can define. Is it necessary to determine the initial layer length for the 3D grid layers or it will be automatically inherited from the solid? Is there any relation between unit numbers in the solid and 3D grid layers? For example, when I assigned layer range for the units in the solid as the table, it worked with some problems in the generated 3D grid. I have also tested many other combinations but without success and faced error as “Error in layer assignments to Solids, aborting”. Alluvium Tertiary Ophiolite Hawasina Begin layer 1 1 1 1 End layer 1 2 3 4 Can anyone provide me some insight / comments into what is going on about the mapping Solid to 3D grid (cross sections attached)? Best, Ata
sgfulton posted a topic in Using AHGWHi, I'm new to ArcGIS and AHGW, as well as LiDAR data. I have a student license for ArcGIS 10.1, and downloaded the demo version of AHGW 3.3.0. I recently downloaded and mosaicked several LiDAR scenes in ArcMap for a mountaintop mine site in eastern KY. I want to work with this DEM in ArcGIS AHGW to generate subsurface stratigraphy, pre- and post-mining volume calculations, etc.. I'm working my way through the AHGW tutorials. However, when I display the DEM in ArcScene it isn't in 3D. Does anyone know what I need to do to the image to use it in ArcScene, e.g., turn it into a TIN or something else? I'm working on a project for my graduate-level spatial analysis class which is due in 10 days (long story...data I was trying to procure for my site never materialized so I'm down to the wire). Any help would be greatly appreciated since everyone's gone home for the holidays! I've attached a .jpg of the LiDAR data I mosaicked for my mine site. I'm excited to be a part of this community and will likely have a ton of questions. I appreciate your assistance and patience as I teach myself how to use the software. Thanks, Stephanie