XS2D COMPONENT

Outline  You can create 2D cross sections in ArcGIS  Cross sections are made of real GIS features  Cross sections use a (S, Z) coordinate system  Subsurface Analyst helps you create cross sections within ArcMap  Manage cross sections within a geodatabase

Subsurface Visualization Layers of 3D volumes that are largely unseen ? ? Visualizing the subsurface can be challenging

Cross Sections …And interpret the rest We can sample the subsurface… AA’ Map A A’Wells Section A-A’ help us understand local geology Cross sections help us understand local geology

GIS Datasets Spatial and attribute relationships tie features together … Borehole log Section lines Wells Raster surfaces …Creating the connectivity we need to construct meaningful cross sections from GIS datasets You can create cross sections from GIS datasets Geologic features

GIS Features Works with your ArcGIS tools Layer symbology, attributes, geodatabase storage, editing… real GIS features Cross section features are real GIS features

 Part of the Arc Hydro Groundwater data model  Is included in the hydrostratigraphy component  XS2D feature classes have a XS2D prefix  They exist in a special coordinate system that translates vertical coordinates so they can be viewed in ArcMap XS2D component Additional data: XS2D_Line, XS2D_Polygon, XS2D_Point…

Common Cross Section Features Cross Section Panel Panel Divider BorelineBoreline Major Grid Minor Grid

Additional Features Arc Hydro Tools You can add additional features using the Arc Hydro Tools Saltwater Interface Surficial Geology Or create your own features and annotation

SectionLine Features belong to a section line Cross sections belong to a section line A set of cross section feature classes per section line…  Simple 2D polylines  Define the cross section in map view

 Are indexed with a HydroID – the unique identifier within the geodatabase  All vertical datasets will be related to the HydroID of the SectionLine SectionLine Features

 Use the Create SectionLine Feature Class tool to create a new feature class  Digitize new section lines using the ArcMap editing tools  Make sure you assign a HydroID to the new features Creating SectionLines

 Central part of the XS2D component  Keeps track of the feature classes in all cross sections  SectionID is a key attribute = HydroID of a SectionLine feature XS2D Catalog

Cross Section Data proximity to the section line You add data by proximity to the section line Built from standard GIS operations like ‘Select By Location’ and ‘Intersect’ A A’ A A’ AA’ A A’ Adding Nearby Wells Adding Outcrops

Cross Section Coordinates Cross sections use a (Distance, Elevation) coordinate system And includes vertical exaggeration… Each system is unique to the cross section… x y S Z S

Vertical Exaggeration Features store exaggerated values, while the grid shows “real” values S z P1 P2 10x Exaggeration PointCoordinates10x Exaggerated Elevation (Feature Vertex Value) Real Elevation (Grid Value) P1(550, 750)75075 P2(550, 400)40040

 Standard XS2D feature classes XS2D Feature Classes

 The Data Frame is the canvas where cross sections are drawn Data Frame Edit Print Draft

2D and 3D Transformations You can convert from 2D to 3D and back again

Building Cross Sections You can build your own workflows for building cross sections

Example Workflow 1. Create SectionLines – sketch cross section lines that are the base for creating cross sections.

Example Workflow 2. Select wells – wells are related with borehole data Tip: Select wells within a distance of a section line

 Click on the Section Line  Choose:  Features to Include  Vertical Exaggeration  Grid Line Spacing Example Workflow 3. Run the cross section wizard Output is a new cross section data frame with features created

Example workflow 4. Import additional data

Example Workflow 5. Create panels using standard ArcMap editing tools

 Helps control the digitization process  Can manage snapping properties and priorities Snapping Environment Vertex Edge End

 Use ArcMap editing tools  Use topology tools Editing Tools Trace Sketch

Example Workflow 6. Arrange the layout Add: Legends Annotation Additional Cross Sections Set: Data Frame Properties Grid Line Appearance

Workflow II – image registration  Start from existing cross section images  Load and register the images to an existing SectionLine  Wizard helps create necessary features (grid lines, panel dividers, panels) based on the image registration process Workflow II – image registration

Image registration wizard Register the image using vertical and horizontal lines

Image registration wizard Result is a new data frame with registered image + XS2D feature classes

Additional data - faults

Adding data - raster data

Adding data – log plots

Key Points  You can create 2D cross sections in ArcGIS  Cross sections are made of real GIS features - can take advantage of all the ArcMap capabilities  Cross sections use a (S, Z) coordinate system  Subsurface Analyst helps you create cross sections – basic tools, Xs2D Wizard