GIS Geoscience Database, Bathurst Camp (CD-ROM) ________________________________________________ Table of Contents ================= 1. About the CD-ROM 2. Documentation 3. Further assistance 4. How to use the CD 4.1 Using the custom EXTECH Data Viewer 4.2 Using ArcView 5. Directory structure 6. File formats 6.1 Vector data 6.2 Raster data 6.3 Auxiliary files (for vector or raster data) 6.4 Documentation files 1. About the CD-ROM ================ This CD contains over 60 layers of geoscience data including bedrock geology, surficial geology, geochemistry, geophysics, mineral deposits, Landsat data, radar data and topographic data. The purpose of this database is to provide a complete, digital, internally consistent and georeferenced collection of spatial data that will assist scientists in mineral exploration, environmental studies, land use planning and other investigations requiring earth science information. The data are not just 'maps' but geographically referenced digital data sets. Wherever possible, a complete set of attributes has been provided with the geographic data sets. In other cases, a sample of the attributes or a data set with generalized classifications is provided, along with information on how to order the complete data set. This database has been developed using ArcView but a custom viewer has been included on the CD to allow the user to visualize and overlay data layers without having a GIS on their system. The data on this CD were compiled using ARC/INFO 7.03, ArcView 3.0a, Spatial Analyst 1.0 and PCI EASI/PACE software packages. 2. Documentation ============= Documentation is provided in HTML and text format (PC format), except for metadata for the EXTECH II Geoscience Database which is provided only in HTML. Documentation is in English. HTML files (.htm) can be read using your standard web browser or recent versions of Corel WordPerfect and MS Word. The 'home page' file for the CD HTML documentation is \extechii\doc\exintro.htm The 'home page' file for the database metadata is \extechii\doc\metadata.htm Other text file documentation: \licence.txt -- licence and disclaimer \citation.txt \extechii\doc\referenc.txt -- complete references for data contained on this CD \extechii\doc\extechv.txt -- documentation for using the EXTECH Data Viewer 3. Further assistance ================== Questions, suggestions, and comments regarding this CD-ROM should be addressed to: Danny Wright or Laura Kemp at Voice: (613) 947-0186 Fax: (613) 952-7308 E-mail:DWright@NRCan.gc.ca 4. How to use the CD ================= The data sets included on the CD can be accessed in several ways: a) Use the custom EXTECH Data Viewer included on the CD to view, symbolize and query the data sets. b) Add the data sets to a project in ArcView to view, symbolize and query the data sets, as well as perform more complex analytical functions. c) Use/convert the data sets to your preferred GIS software for querying and analysis. 4.1 Using the custom EXTECH data viewer ----------------------------------- To use the EXTECH Data Viewer, you need to install it on your hard drive. To install the viewer: --------------------- 1. Use the 'Setup Viewer' button on the introductory slide show or 2. a) Open Windows Explorer b) Find and double-click on :\extechii\extechv\setup.exe c) Click OK to run the installation utility. Follow any instructions provided by the utility. To run the viewer: ----------------- 1. Click the Start button in the Windows task bar. 2. Select Programs... from the pop-up menu, then select EXTECH Data Viewer from the list of programs. To view data sets: ----------------- 1. Select the data set(s) you want to view from the pull down menu system. The selected data set will be loaded and displayed using a default symbolization. 2. To make a data set invisible in the viewer, uncheck the box to the left of its name in the legend. 3. To unload a data set, reselect it from the menu system (when a data set is loaded, a check mark is placed beside its menu item). 4. To unload all loaded data sets, select 'Clear Map' from the File menu. 4. To close the viewer, select 'Close Viewer' from the File menu. Please refer to \extechii\doc\extechv.txt or \extechii\doc\extechv.htm for further documentation of EXTECH Data Viewer functions. 4.2 Using ArcView ------------- 1. Open or create a new ArcView project file. An ArcView 3.0a project file, \extechii\extdb\extechdb.apr, is included on the CD and contains references to all the data sets. 2. Click the Add Themes button or select Add Themes... from the View menu. 3. In the Add Themes dialog that appears, select the Feature Theme choice from the 'Data Source Types' box in the lower-left corner to add vector data sets; select Image Theme to add raster data sets to the project file. 4. Select the data sets to be added and click OK. 5. Directory structure =================== The CD-ROM structure is as follows: \EXTECHII \DOC - HTML documentation (English only) \INTRO - Slide show introduction \EXTDB - Database \METADATA - metadata files for data sets (HTML format) \BASES - topographic data sets, DEM, catchment basin map, reference map \CHEM \TILL - till sample point data set, surfaces derived from points \STRMSED - stream sediment sample point data set, surfaces derived from points \LITHO - lithogeochemical point data with complete attribute set \GEOLOGY - 1:20 000 scale geology, 1:250 000 geology \GEOPHYS - conductivity, magnetic and airborne gamma-ray spectrometry data \IMAGERY \TM - 7 bands of TM imagery, two composite images \RADAR - airborne radar and Radarsat scene \QUATERN - quaternary geology \EXTECHV - Viewer customized to view Bathurst Camp data sets on this CD 6. File formats ============ 6.1 Vector data Shapefile (.SHP, .SHX, .DBF) ---------------------------- 'Shapefile' is an Environmental Systems Research Institute (ESRI) format for storing geometric location and attribute information of geographic features. Feature geometry and attributes are stored in separate files with specific file extensions, all stored in the same folder on disk, as follows: .shp - feature geometry .shx - index of the feature geometry .dbf - attribute information of features (dBASE format) The format is the vector format used by ESRI's ArcView software. All vector data sets on this CD are provided in 'shapefile' format. They can be viewed and symbolized using the EXTECH viewer included on the CD. 6.2 Raster data TIFF (.TIF, .TFW) ----------------- Raster data sets, including all geophysical data, Landsat and radar imagery and the inverse distance weighted surfaces derived from NGR stream sediment geochemistry are provided in georeferenced .tif files with no compression. Each .tif file on the CD has an associated 'world file' (.tfw) with the same name. It is a text file containing georeferencing information and must be located in the same folder as the .tif file in order for the image to be georeferenced correctly. The .tfw file is created by ARC/INFO during the conversion from ARC/INFO's internal raster format (GRID) to TIF. Bitmap (.BMP) ------------- Screen captures of the legends created for the raster data sets in ArcView were saved to a 24-colour bitmap format files. In the EXTECH Data Viewer, double clicking on the legend of an image/raster data set will display this legend. The names of the .bmp files match those of the associated .tif files. 6.3 Auxiliary files ArcView Legend File (.AVL) -------------------------- Where possible and applicable, the legend that was used to symbolize each data set has been included so that ArcView users can replicate the classification and symbolization of data if they wish. The files have the same file name as their associated data sets. RGB file (.RGB) --------------- Where possible and applicable, text files containing the RGB codes that comprise the colours used to symbolize data sets have been provided. These files are used with some software (ArcView, SPANS), with a .clr extension, to automatically read colours to image or raster data. The general format is: value : red-value green-value blue-value For example: 1 : 255 153 153 An .rgb file of the GSC shadeset (\extechii\extdb\gscshd.rgb) developed by the GSC's GID section for use in ARC/INFO has been included. Most vector data sets include an attribute called SYMBOL in their attribute tables. This field contains the colour (shade) from the GSC 'shadeset' used to symbolize the feature. This number is used by the EXTECH Data Viewer to reference the associated colour's RGB values. An additional twenty colours have been inserted into the range of symbols from 221 to 240 to include the red-purple-blue colour ramp used to symbolize the geochemical surfaces included in this CD. REMAP (.RMP) ------------ Where possible and applicable, a text file has been included which contains the ranges or break points of raw data and the integer values to which they were mapped. The format of this file is either: minimum_value maximum_value : new_value or maximum_value : new_value The file names correspond to the data set file names. 6.4 Documentation files HTML (.HTM) ----------- All of the documentation of data sets and software on this CD has been provided in HTML format. HTML is a platform independent format that can be displayed by any web browser and by many current word processors, including Corel WordPerfect and Microsoft Word. Text (.TXT) ----------- As much as possible, documentation has also been provided in plain text in PC format. Text files will require a DOS2UNIX conversion to be read properly on UNIX systems.