Geo Express 3D


 

The features of GeoExpress are covered under the following headings:
|Introduction |Overview | Scattered Data | 2D Grids | 3DGrids | Line Data| |Vectors Maps & Images |
UBC | Oasis |Technical | Data Types | Platforms Supported | Features|

Introduction

GeoExpress® is a 3D Visualisation Package that integrates Geological, Geophysical, Geochemical and Borehole Data. It can be used to visualize 1D, 2D and 3D data in 2D and 3D space. As well as these fully functional 3D display facilities, GeoExpress® also has the ability to perform interactive analysis making this product a powerful tool for the interpretation of earth science data, enabling fast, informed decision making.

Integrated volumes & drillholes

Example of a simple integration of volumes and drillholes.


Drillholes have been combined with a density model from the UBC inversion modelling software. Three perpendicular slices are displaying cross-sectional data as solid and line contours. These slices can be moved through the model and exported as Geosoft grids.

Overview

The overall objective of the system is to provide true 3D viewing in a visual and quantitative system. As it is PC based, GeoExpress can be easily used in the field to assist the integration and interpretation of data sets typically used in exploration, thereby providing 3D solutions for exploration objectives. GeoExpress provides the user with a versatile, fully interactive 3D environment for the manipulation, interrogation and display of geoscientific spatial data. Data can be imported from ASCII and ODBC sources in addition to a range of formats from other major exploration software packages that can be quickly combined in 3D space. Models can be positioned and lit dynamically and viewed simultaneously in multiple widows in both 2 and 3 dimensions if necessary. The program places no restriction on the amount of data included in the same model allowing multiple format projects to be easily assimilated. Large datasets can be cropped and downsized to increase speed. Display parameters, such as colour and opacity, for each object are controlled independently and can be easily interpreted using legends as well as interactive query/digitisation tools and various axes. Distribution of 3D models is made as simple as possible by the provision of 3D PDF, U3D, MPEG, AVI and VRML formats as well as an interactive animation format, which can be viewed in the low cost, standalone application, GeoReviewer. 3D PDF files retain full 3D interactive manipulation within the standard free Adobe Reader.

Vertical grids with interpolated volumes

Example of vertical grids with interpolated volume.

A volume interpolated between IP sections (geosoft grids) using the grid data is positioned below a DXF map showing geology which has been draped over a DTM.

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Scattered Data

Scattered data with an infinite number of components (attributes, Z values) can be easily displayed in GeoExpress. Data is automatically located in the users coordinate system and can be freely rotated, scaled and translated in 3D space. Many visualisation modules within GeoExpress allow more than one component to be displayed by the same object (e.g. colour and size of a sphere). Several different display options can be active at the same time allowing a large number of different components to be displayed simultaneously at each point. Scattered data can be displayed in its true position if an elevation is given. If the coordinate information is X, Y only, the scattered data points can be draped over 3D surfaces by extracting an elevation value from the corresponding position on the 3D surface.

Basic interpolation methods, such as triangulation can be used to grid scattered data in 2 and 3 dimensions. Once gridded there are a range of modules within GeoExpress to effectively display this gridded data. The display of points from a dataset can be clipped to specified data ranges. For example, this would allow all occurrences of components A and B to be displayed where component C was above a certain value or below a certain altitude. Individual points can be labelled and their values displayed in a legend bar. Scattered data can be read in from ODBC sources and manipulated using SQL or read in from a simple ASCII text file. Additionally, vector (directional) information at each point can be dynamically displayed using a range of arrows.

Scattered data with UBC mesh

Example of scattered sample data with UBC mesh

Spheres of different colours and sizes displaying multi-parameter scattered sample points (Euler deconvolution solutions) with an inverted UBC susceptibility model.


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2D Grids

GeoExpress has some basic routines for interpolating 2D grids from a 2D field of scattered data. Image (grid) formats from other exploration programs such as Geosoft, ERMapper and GoCad can be quickly and easily imported and displayed in 3D space. Multiple Geosoft grids of any size and orientation (vertical) can be imported in one easy step using a master file containing 3D coordinate information. Grids can be independently moved and coloured, as each is a separate object within a GeoExpress model. GeoExpress can handle grids with multiple components and varying cell sizes. 2D grids can be warped to form 3D surfaces using any component to define the elevation of grid node. One grid can be draped over another grid allowing a 3D surface such as a DTM to be coloured by geochemical or geophysical data. The surface can then be dynamically scaled. 3D interpolations can be performed between grids of any orientation using the data from the grid nodes. This would produce a volume between IP sections for example. Grids can also be displayed using isolines and solid contours with the colour and opacity being independently controlled for each. Any number of grids can be displayed at once. Range and intervals for contours can be set by the user. Large grids can be quickly manipulated by cropping, downsizing and using a wire frame display.

Multiple 2d Grids

Multiple 2D Grids

5 separate 2D grids displayed at once. The top surface is displaying results of a gravity survey, draped on a DTM. The bottom two grids are showing results from magnetic surveys. Copper geochemistry, draped over the magnetic grid is displayed using spheres.


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3D Grids / Meshes

GeoExpress can work with both structured and unstructured meshes of any size with any number of components. Basic interpolation routines can be used to construct volumes within a mesh. Volumes within meshes can be displayed using 3D contours, solid volumes, slices or separate 3D objects at each node. Values from different meshes can be combined on the same nodes. Position of volume surfaces and slices can be dynamically controlled and are updated on the fly. Slices can be easily exported as Geosoft grids. Meshes can be saved for re-use as Net CDF format files. Any number of different meshes can be displayed, manipulated at once with no limit on the number of visible objects on the screen at any time.

Multiple 3D Meshes

Multiple 3D Meshes

Here, three complex 3D meshes (Modelled gravity magnetics and ore body) are displayed with simple geometric shapes from Encoms EMVision.

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Line Data

Line data can be imported as ASCII files with 3D coordinates already calculated for each datapoint, as drillhole collar, survey and data files, as a Geosoft XYZ file or from ODBC sources. These lines can be oriented in any direction (e.g. survey lines) and do not have to be straight (e.g. surveyed drillholes) Cylinders of variable size and radius can be used to display the drill trace and the relative values of two separate components at the same time. A range of 3D objects such as histograms, spheres and linegraphs can be positioned on lines and used to display line data. Vector (directional) information can be displayed using arrows along the lines (e.g. magnetic gradient along survey lines). Data from a selected line can be displayed as a 2D graph and points on the drillholes in the 3D view can be selected from the 2D graph. Points on lines can be linked by a triangulated surface upon selection. Any surfaces (faults, contacts) can be displayed with the drillholes. Basic interpolation routines can be used to construct volumes based on line values. Lines can be labelled and selected for display. An ore estimation module can be used to estimate size and value of a volume.

Example of Line Data

Example of Line Data

Survey lines over greyscale ERMapper image. Lines are coloured by elevation. Vector arrows are showing direction of magnetic gradient and strength of field by size.


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Vector maps & images

GeoExpress can read both 2D and 3D DXFs and can position them in any orientation (vertical horizontal) with no restriction on the number of DFXs visible at the same time. Both 2D DXFs and 2D shape files can be draped on a 3d surface such as a DTM grid. GeoExpress reads and writes a range of images. Images can be georefereced at the corners and draped on any 2D / 3D surface. A full image processing suite exists within GeoExpress providing a range of routines such as edge enhancement and Texture meshing in GeoExpress allows an image to be 'wallpapered' onto any object.

Vector maps & images Vector maps & images Vector maps & images

Draped DXF and Image

A polygon vector map (Geology) and a georeferenced image have both been draped over a DTM. The DXF has been positioned above the image for viewing. The three images show the model viewed from 3 different angles.

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A new interface to Oasis database files (gdb)

Geosofts OASIS database provides an efficient storage for geoscientific point, line, drill holes, and 2D grids. GeoExpress is able to directly select subsets of OASIS data sets and present them visually in 3D space. For example 2D grids which can represent slices through a 3D volume can be automatically volume rendered. Alternatively the 3D volume gridding of GeoExpress can be applied to any of the data. No data channel is excluded from the GeoExpress reader. Even the multi component OASIS array channels used for data such as structural geology measurements, EM multi time data sets, or tensor gravity measurements are accessible. These are easily selected and displayed as multi component vectors or other graphics objects such as variable ellipse in the GeoExpress viewer.

Other GeoExpress features include the ability to open multiple databases in the same view. This provides an ideal method for simultaneously importing different Wholeplot drill hole data. As well as the excellent graphics the numerical values remain accessible for data selection and further processing. GeoExpress can then write these modified or selected data values back to an OASIS database for use by other software.

The view on the right shows a 3D magnetic field volume generated from 2D grids stored in an OASIS database.

The reader (not shown) provides 3D coordinate definition, line selection, data selection and array channel configuration.

 

UBC Models

GeoExpress can read all 3D meshes produced by the UBC geophysical inversion modelling suite. A range of visualisation tools allows the data within these meshes to be displayed clearly and efficiently. Any number of meshes can be displayed at once and the display method for the values within each mesh can be different and independently controlled for each. The node data from any number of meshes can be combined and attached to one mesh for display and comparison purposes. Meshes can be sliced in any orientation. Uniformly gridded slices can be exported as Geosoft grids.

Mulpiple UBC Mesh display

Multiple UBC Mesh display

The components from two different UBC meshes (Density / Susceptibility) have been combined on the same mesh for comparison. This mesh is displayed using an isosurface which has been cropped to reveal a isovolume set at a different value in the same mesh. Two perpendicular, semi-transparent slices are displaying cross sectional information from the mesh.

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Technical Specifications

No limit to import file size or dimensions. Full database connectivity. Supports Stereo-viewing with supported stereographic eye-wear (not included). A range of colour schemes and ramps can be applied to each object independently. Colour Legends and Axes for 2D, 3D display. Both lighting and viewing position can be dynamically altered. A full range of mathematical functions can be applied to the data, with the results displayed on the fly. Values and positional information of data can be queried and collected on screen and exported as a list in a conventional text file. Any object can be used as a sampling tool, i.e. sampling a 3D mesh with a drillhole or DTM
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Data Types

Data TypeInputOutputFile Extension

Adobe 3D pdf

ASCII text output from digitiztion

AVS field format

AVS Geometry format for use with GeoReviewer

Colour Tables

Computer animating formats

Database and spreadsheet sourced

Drill holes (point data and FromTo data)

DXF 2D (Vertical and Horizontal)

DXF 3D (Vulcan, Gemcom, Encom, Potent)

EarthVision surfaces and fault offsets

EM models (AMIRA projects, MT 3D resistivity volumes)

Encom's EM vision plate model

ERMapper ecw

ERMapper image files (multi banded)

ESRI 2D shape files (Arcview)

Gemcom export volume model

Georeference control for ungeoreferenced images

Geosoft 3D volume

Geosoft ASCII xyz survey data files

Geosoft grid formats (compressed and uncompressed)

Geosoft OASIS databases

GoCAD tsurf and volumes

HDF5

Images Georeferenced (jpeg2000 and geotiff)

LAS drill files

Netcdf

Postscript files

Raster images

SEGY 2D and 3D

Surfer grid format

Tabular data in ASCII format (points and grids)

UBC 2D IP model sections

UBC Mag3D and Grav3D models and data files

USGS DEM

VRML

Vulcan 3D centroid models

WELLCAD drill images

 

 

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Platforms Supported

  • Windows XP, Windows 7

Product Features

3D Display

  • Simultaneous 3D views of multi-parameter data grids, drill holes or sample points.
  • Rotate, Pan, Zoom in 3D.
  • Capture Screens or create Animated Displays of your models.
  • Automatically Scales to the user's co-ordinate system.
  • 3D PDF Report Generation

Interactive Data Analysis

  • Contour data, set Thresholds, view any Plane through your model - all whilst seeing the results as you do it.
  • Interactively generate one anomaly type from another. For example create a magnetic source from an irregular shaped 3D volume derived from either an EM conductor, ore zone or IP phase response.

Build Combined Models

  • Import data from a wide range of Geological and Geophysical software systems. File Types Supported...
  • View any number of these together in one model.
Magnetics data coloured according to gravity data
This is a model whose shape is derived from magnetics data and which is coloured according to gravity data.

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