# Presentation: 145440

## Virginia’s Approach 

- Roundtable Discussion 1
- Acquiring and Preserving Map Images

**Intergovernmental Benchmarking Workshop on Underground Mine Mapping**
**October 15 & 16, 2003**
**Louisville, Kentucky**

## Acquiring Mine Maps

- Campaign launched through various media outlets requesting mine maps
- Maps & mine locations acquired through permitting process
- Private party donations
- Company archives
- Initiated communication with suspected map sources
- Accepted burden of acquiring maps & provided results to contributors

## Preserving Map Images

- Images are stored on a central server & can be accessed by all personnel
- Digitization of mine boundaries
- Use of GIS software for access
- Scanned image file formats

## Image File Format

- Standard format is tagged image file (.tif)
- Compatibility with multiple software packages and image viewing applications
- Upon request, images can be compressed into a Mr. SID file format
- Images compressed with Mr.SID can be used with a free downloadable viewer and is becoming more compatible with various software applications

## Scanning Solutions

- Portability of scanners are essential for on-site scanning of company mine map archives
- Large format decreases need to fold maps to scan = reduced image editing to merge images
- Associated scanner software allows manipulation of image files for increased image quality
- ColorTrac 5480 scanner will accept materials up to 12mm in thickness
- Ultimately the goal is to obtain the best scan possible at a file size that is manageable

## Large Format Scanners

- Action Imaging Solutions – ColorTrac 5480

- Vidar – TruScan Titan

## Cataloging

- Information derived from mine maps are put into a Microsoft sql database
- Creation of Index of map archive
- Data, images and vectorized outline are used to generate numerous products

## Slide 8

## Slide 9

## Slide 10

## Geo-referencing

- Defining in real world coordinates how an area represented on the map fits on the earth’s surface
- Maps geo-referenced into Virginia State Plane Coordinate System
- Information shown on the map such as coordinate grids, identifiable surface features,  coal outcrop configuration, land tracts, etc., are used to place maps.
- Maps are geo-referenced using AutoDesk’s AutoCAD Map

## Digitization

## Raster to Vector

- Image geo-referenced to Virginia State Plane Coordinate System
- Heads-up onscreen digitization
- Mine boundary linked to scanned image through index
- Mine boundaries are used with other DMME spatial data in GIS

## Slide 14

## Spatial Data

- Regulatory Data
- Water Monitoring
- Permit Boundaries
- Geologic Samples
- Hollow Fills
- PMU
- Basemap Elements
- USGS Quad Index
- Political Boundaries
- Easily Incorporated Features
- Coalbed Mapping
- Quad Maps
- Orthophotography
- Satellite Imagery

## Slide 16

## Summary

- Proactive approach to obtaining mine maps
- Obtain the best scan possible at a file size that is manageable
- Have a system in place for indexing and cataloging
- Use images to create a usable digital product
- Use industry standard software, hardware and file formats for compatibility
- Implement methods & procedures for disseminating the data to the end user