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Co-ordinate Geometry

Survey Programs

Leica Programs

Windows Interface

AutoCAD Utilities

Pocket PC

Excel Spreadsheets

Casio Utilities

Psion Workabout

PDF Documents

Internet Utilities

After Hours

Surveying Co-ordinate Geometry

   Trigonometry Workbook for Dummies  (PDF 3.05 Mb)

Useful introduction or refresher into Trigonometry.

   Co-ordinate Transformations  (Link)

Mathematical equations required to carry out simultaneous Scale, Rotation and/or Translations

    Resection (Graphic)

Graphical illustration of the "tienstra" resection algorithm.

    Sine and Cosine Rules (Graphic)

Triangle solutions.

    Intersection by Angles (Graphic)  

Intersection computation using the "Angles" method.

    Intersection by Bearings (Graphic)  

similarly, using the "Bearings" method.

   One Point Circle Fix (Graphic)  

Find the centre of a circle by measuring the distance to one point.  Useful for calculating inaccessible vertical pipe centres or plumbing tubular columns using reflectorless EDM.

    Area (Graphic)

Cross multiplication formula to calculate the area of a polygon.

    Point to Plane Distance (Graphic) ** Updated October 2011

Need to know how much flat an inclined surface is?  This shows how to calculate the perpendicular distance from a measured point to a design 3D plane (defined by 3 points).  Thanks to Glen for spotting the typo!

See also Casio fx-7400g plus section below...

   Secrets of Mental Math  (PDF 1.53 Mb)

Simple tips and tricks to be able to carry out normally difficult mental arithmetic.

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Surveying Programs

    Intersections  (40Kb)

This VisualBasic program computes Intersections from observed data.  Includes example files.  Users of Leica TCR700 series should also download the "Angles.frt" file in the Leica Format section.

    StarNet (Demo)  (4.2 Mb)

Demo Version (v6.025) of the Star*Net Angle Adjustment program.  Limited to 10 stations.

    StarNet v6.036 documentation  (669 Kb)

A tour of the v6.036 Starnet demo program in pdf format.

    StarNet v6 manual  (2.29 Mb)

The official StarNet v6 Reference Manual for the Standard and PLUS editions.

   CMT CogoCAD v2.2  (4.85 Mb)

Freeware data manipulation, co-ordinate geometry, and import/export facility.  Unfortunately, uses US format of Northing, Easting.

    A Guide to Co-ordinate Systems in GB  (637 Kb)

A PDF introduction to mapping co-ordinate systems and the use of GPS datasets with Ordnance BSurvey mapping.

   GPS for Dummies  (PDF 18 Mb)

A PDF e-book covering all aspects of Global Positioning.

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Leica Programs

   Leica Geosystems

    Leica TPS user guides  (Link)

A selection of pdf user guides for the TPS400, TPS700, TPS800 & TPS1200.

    Leica Survey Office v2.21  (11 Mb)

Data downloading and manipulation software for Leica users.  This version was freely downloaded from the Leica Geosystems website.

    TPS-DNA-Online_v114.pdf  (229 Kb)

Interface commands for TPS instruments using RS232 interface.

    Leica USB Download Cable - Driver v1.0 (1.43Mb)

Device driver for the GEV189 & GEV195 USB Download Cables.  Zipfile includes installation instructions.

Leica Format Manager

    Leica Formats  (Link)

User defined Leica Formats for TPS300/700 theodolites.

Leica Instrument Explorer for the Pocket PC

Leica Instrument Explorer enables you to exchange data from a total station to your Pocket PC or vice versa. Also enables you to view and edit survey data (e.g. coordinate files, measurement files) on the Pocket PC.

Supports TPS400 & TPS700 Instruments in the following platforms:

To install Leica Instrument Explorer unzip the downloaded file, and then copy the files LeicaInstrumentExplorer.exe and LeicaEditor.exe to the directory Windows\Start Menu\ in the Pocket PC.

Leica GSI to CSV converters


   Convert v1.0b  (39 Kb)

MS DOS prompt executable program to strip co-ordinates recorded in Leica GSI format into CSV format without the need for Survey Office or Excel.  Options to output results in metres or to be renumbered.


    File Converter  (212 Kb)

Converts Leica (GSI-8 & GSI-16) and Zeiss (DAT/REC) data files to and from CSV data format.

Program is in German and English.

Thanks to MichaeL at SourceForge


    CSV2GSI  (29 Kb)

A Microsoft Excel spreadsheet that converts CSV co-ordinates into a GSI-8 string. (beta version).

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Windows Interface Software

    Prolific PL2303  (2.22 Mb)

Serial to USB ser2pl.sys driver.

    Terminal  (170Kb)

Modern version of the old "Terminal for Windows v3.1" program.

    Terminal v3.1  (90Kb)

Original Windows v3.1 files.  Extract to Windows directory. Also includes "Psion Workabout" download icon and settings file.

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AutoCAD Utilities

Top Tips


Use this command to crop lines that overlap added text.

Type, "extrim", then select the text that requires clearing.  Selecting inside of the generated box will clear any linework from behind the text.

View image

AutoCAD Literature

  AutoCAD 2005 for Dummies  (PDF 12 Mb) 

  AutoCAD 2007 for Dummies  (PDF 12 Mb)

  AutoCAD 2008 for Dummies  (PDF 9 Mb)

  AutoCAD 2011 for Dummies  (PDF 9.72 Mb)

  Autodesk Learning AutoCAD 2010  (10.0 Mb)

The Autodesk guide to learning AutoCAD 2010.  The zipped set-up file will automatically install and create a desktop shortcut to a "Help" style full on-screen tutorial for AutoCAD 2010.  Complete with all of the chapters that are in the PDF documents below.

At the same time, all of the necessary "dwg" exercise files are created in a learning folder for the user to practice along with.

  Learning AutoCAD 2010 (Volume 1)  (PDF 8.43 Mb)

446 pages in e-book format.  Creating drawings, files, modifying, snaps, properties etc

  Learning AutoCAD 2010 (Volume 2)  (PDF 10 Mb)

362 pages.  Dimensioning, hatching, layouts, plotting and templates.

  Learning 2010 Exercises  (12.4 Mb)

A zip-file containing all of the AutoCAD drawings required for the above.

  AutoCAD - Secrets every user should know  (PDF 18.3 Mb)

497 pages in pdf format. 

  AutoCAD 2010 and AutoCAD LT 2010  (PDF 33.7 Mb)

1299 pages of the ultimate reference for AutoCAD 2010 (without DVD). 

AutoCAD Macros

The following macros are intended to simplify the process of importing and analysing survey and/or design data.

Download    How to install a VB macro and create a custom button  (PDF 1 Mb)

  Macro   Description
  Download  ALL MACROS


  Download  Import XYZ  v1.7

View Screenshot

  Imports CSV files of points into AutoCAD drawing

  Download  Export XYZ  v1.7

View Screenshot

  Exports CSV/Text file of points from AutoCAD drawing

  Download  Point ID v3.22

View Screenshot

  Plots the co-ordinates of a selected point within a text-box

  Download  VectorDevs v2004

View Screenshot

  Calculate and display as-built vector errors

AutoCAD 2004 - 2006

  Download  VectorDevs v2007

View Screenshot

  Calculate and display as-built vector errors

AutoCAD 2007 - 2010

  Download  VectorDevs v2011

View Screenshot

  Calculate and display as-built vector errors

AutoCAD 2000 onwards

  Download  Distance2 v1.0

View Screenshot

  Calculates the Horizontal distance between 2 points

  Download  Transformation v3.1

View Screenshot

  Shift, scale and rotate any 2D drawing onto your site grid coordinate system.  Updated March 2009

  Download  Dash

View Screenshot

  Joins/draws lines between pairs of points without need to click "repeat"

  Download  Balloon v1.1 (beta)

View Screenshot

  Plots a sequentially numbered circle for ID purposes

    AutoCAD Lisp Routines

Lisp routines are loaded in a similar manner to macros (Load Application), but can be run from the command line by typing the lisp name.  eg flatten

  Lisp Routine   Comments
  Download  flatten   Flattens 3D drawing to zero elevation
  Download  3dcircle & 3darc   Draws 3D circle or arc through 3 points
  Download  xpipe & xtube   Converts a line to solid pipe or tube

    Points Export for AutoCAD  (Link)

This plug-in gives AutoCAD the ability to export points to text files.  This software is available for free trial.

    Universal Column Blocks  (41Kb)

Standard UC Sections in Acad DWG Format.  Suitable for inserting into drawings as a block.

CAD Utilities

    AutoCAD Version Explorer  (79 Kb)


A stand-alone program that provides an Explorer-like interface to quickly view AutoCAD previews and version information.

Autodesk website  (Link)

    Autodesk Design Review 2012  (46.5 Mb)  ** NEW **

Autodesk® Design Review software is the all-digital way to measure, mark up, and annotate 2D and 3D designs, all without the original design creation software.  Free DWG Viewer for AutoCAD.

May also require one or more of the following:

Microsoft .NET Framework version 4.0 or later  (48.1 Mb)

Microsoft Visual Redistributable C++ 2010 32-bit  (4.83 Mb)

Microsoft Visual Redistributable C++ 2010 64-bit  (5.45 Mb)


Microsoft Visual Redistributable C++ 2005 SP1 32-bit  (2.59 Mb)

Microsoft Visual Redistributable C++ 2005 SP1 64-bit  (3.05 Mb)


    Autodesk DWG TrueView™ 2012 32-bit   (211 Mb)  ** NEW **

    Autodesk DWG TrueView™ 2012 64-bit   (272 Mb)  ** NEW **

AutoCAD Trueview software is a free stand-alone DWG viewer with DWG TrueConvert software included.

May also require:

Microsoft .NET Framework version 4.0 or later  (48.1 Mb)

Older versions of Design Review and TrueView (and lots of other free stuff) can be downloaded from the CadForum website:

    Free DWG Viewer v7.0.1.11  (48 Mb)  Trial version

    Free DWG Viewer v6.0.0.6  (14 Mb)  Print Disabled

Free DWG Viewer will open and view AutoCAD DWG (R12 to 2008), DXF, DWF and secure CSF formats. 

If you need to print out a drawing, press "Print Screen" on your Keyboard, "Paste" into any graphics program (eg MSPaint), Crop and Print.

    View Companion  (0.9 Mb)

This program is suitable for viewing and plotting hp-gl/2 (*.plt & *.hpg) files that have been created in other applications such as AutoCAD, without the need for such software.

    Any DWG and DXF to PDF Converter  (5.13 Mb)

Batch convert any DWG or DXF drawing to PDF without the need for AutoCAD.  Option to convert Model or Layout drawings.

Draughting Utilities

    NGraphPaper  (1.93 Mb)

Useful utility for creating blank sheets of graph-paper.


    5D CtlP PDF Creator  (5.5 Mb)

Create PDF files from any "print" enabled program.  The file is zipped and includes a "License Code".  Useful for creating PDF format drawings from AutoCAD for clients who do not have a DWF viewer.

    CutePDF Creator  (Link)

Create professional PDF files from almost any printable document.  Link to free download and installation.

or direct download CuteWriter.exe  (1.6 Mb)

CAD Alternatives


A9CAD is a general purpose two-dimensional CAD program. It supports industry standard DWG & DXF drawing formats.

Operating Systems: Windows 2000/XP/Vista

License: Freeware

Current Version: 2.2.1

    A9Tech Website  (Link)

    A9Cad v2 Setup  (15.5Mb)


FreeCAD.com is a directory of free CAD, CAM and CAE programs. There are many excellent CAD, CAM and CAE programs that are being given away.

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Pocket PC


    Levelling Sheet for Pocket Excel  (12Kb)

A zip file containing a blank levelling sheet that can be used in Pocket Excel 2002 on Pocket PCs.

Leica Instrument Explorer for the Pocket PC

See Leica Programs above

    3D Circle Fix for Windows Mobile  (24Kb)

A Pocket Excel spreadsheet that calculates the 3-D centre of 3 known points.  Also works in MS Excel.  Download and transfer to your mobile device.

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Excel Spreadsheets & Macros

 Excel 97

    CSV2GSI  (29 Kb)  ** New October 2011 **

A Microsoft Excel spreadsheet that converts CSV co-ordinates into GSI-8 strings. (beta version).

    3D Point to Line  (32 Kb)

An Excel spreadsheet that calculates the three-dimensional offset of a point from a line determined by two points.  See here

Useful if you want to know how far off a line a point is, if the reference line is not flat.  The spreadsheet calculates the Intersection Point (IP) of the surveyed Point to the Line at right angles and also displays the "Chainage" along the line to the IP.

Also available for the Casio FX7400g+

    3D 3 Point Circle Fix  (16 Kb)  ** New February 2010 **

Excel 2003 spreadsheet that calculates the centre co-ordinates (and radius) of a three-dimensional circle passing through 3 known points (X, Y, Z).  Contains a macro enabled button to clear the data.

    3D 3 Point Circle Fix (4dp)  (10 Kb)  ** New May 2010 **

This version does not contain the "Clear All" macro which may cause problems in earlier Excel versions.  Data/Results are to 4 decimal places.  Thanks John.

    Bowditch Traverse Adjustment  (145 Kb)

Excel spreadsheet to calculate and adjust open or closed traverses.  Includes an example and diagrams.

    Sets of Angles  (71 Kb)

Excel 97 Macro to reduce "Sets of Angles" data recorded in Leica GSI format.  The Macro will reduce the raw data to angles, and given the Station and RO information, reduce these angles to co-ordinates in mm or metres.

The zip-file also contains some test data loaded into a worksheet.

    Intersections  (28 Kb)

MS Excel Template, used to compute 3-D intersections from manually entered data.

    Resection  (45 Kb)

Excel spreadsheet to calculate Station co-ordinates given the arbitrary bearings to 3 known points.

    Coordinate Transformations (Basic)  (44 Kb)

An excel spreadsheet used to transform points between co-ordinate systems given the data of 2 points in both systems.

    Coordinate Transformations (Advanced)  (58 Kb)

Submitted by John Vossepoel, this spreadsheet contains two co-ordinate transformation worksheets: Affine Transformation and Helmert Transformation.

    Bearings  (14 Kb)

Simple excel formula calculating the Bearing between two points. Updated thanks to John Vossepoel.

    Circular Curve  (36 Kb)

Excel spreadsheet to calculate co-ordinates of points equally spaced along a circular curve, given co-ords of TP1 and TP2 and a radius

UPDATED:  Also calculates points along the curve at a given chainage...

    Area  (25 Kb)

Simple spreadsheet to calculate the area of a polygon.

    Excel 2007 for Dummies (PDF 6.19 Mb)

Zip file of the PDF book "Excel 2007 for Dummies".

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Casio Utilities


Casio Interface Software

    FA-122.zip  (297 Kb)

FA-122 is the official Casio software. With it, you can send data from your computer to your calculator and vice versa. Of course you need an interface cable. The software can also be used to view .CAT files in a "human" form. Other features are screen captures, .CAT files edition and creation.  To send/receive .FXI programs, see the FXIWin software below.

    FA-123.zip  (450 Kb)

FA-123 is an update of the FA-122 software.

    FA-124.zip  (2.59 Mb)

Latest version of the Casio FX interface software.

    FXIWin Interface Software   (836 Kb)

This zip file contains the Yellow Computing FX Windows Interface editor used to create, view, print or modify programs written for the Casio Power Graphic models. Version 1.9.2.

Requires special cable (FA-123 or similar) to download or upload directly.

    CasioFont.zip  (13 Kb)

This is (the official) Casio FX true type font. It was originally included in FX-INTERFACE program released by Casio.

    CasForm10.rar  (172 Kb)  or  CasForm10.zip  (216 Kb)

© Roy Maclean

A comprehensive Casio Format converter for g1m, cat, fxi, txt and ctf formats.

    Cat2Fxi v4.rar  (137 Kb)

© Roy Maclean

This updated program converts Cat <-> Fxi formats for the Casio Graphic calculators.

Visit Roys Website:  http://www.spiderpixel.co.uk/caspro/

    Prolific PL2303  (2.22 Mb)

Serial to USB ser2pl.sys driver for interface cable.

Casio FX7400g Plus

    Casio fx-7400G PLUS Instruction Manual  (1.72 Mb)

The official instruction manual for the Casio fx-7400G PLUS in PDF format.

    InSight Ver 1.2  (Link)

A land surveying suite of software for the FX7400g+.  Requires an interface cable to install the full set of programs properly.  The website also includes access to a complete user guide to the software and other links.

     Casio FX7400G Plus Programs (Link)

A selection of 31 of my own programs  that can be uploaded to the 7400g Plus via a PC Interface cable (which can be purchased separately) and FXIWin Interface Software.

The programs include:

"Intersection by Bearings", "Intersection of Lines", "Resection", "Co-ordinate Transformation", "Chainage & Offset", "Traverse", "Bearing & Distance", "Area", "1 Point Circle Fix", "3 Point Circle Fix", "Curve", "Point to Plane" and "3D Circle Fix", "Survey" and "Levelling"

There is also a Users Manual (in pdf format) including a description of the programs, along with some examples to show how they work and should be used.

These programs are being supplied by an ebay user pretending to be the author.

FX-Interface Cable

Casio Interface cables and software are available to UK customers from "science_studio" on ebay:

www.ebay.co.uk  (Link to view "Buy it Now" item)

Casio interface cables for this model may be obtained from the German manufacturer:

www.fx-interface-de  (Link)

or in the UK at:

www.CasioExtra.co.uk  (Link)

www.Calculators-Online.co.uk (Link)

Casio Personal Computers

Casio FX730P

    Casio FX730P Manual  (7.57 Mb)

Scanned copy of the FX730P owners manual in PDF format.

Casio FX850P/FX880P

    Casio FX850P & FX880P

    Casio FX850P & FX880P   (6 Kb)

A collection of programs written for the Casio FX850P/FX880P.  There are no instructions, but the programs are fairly self explanatory.

    Casio Interface  (Link)

Instructions and on how to upload/download Programs to/from your FX850P or FX880P without the need for an expensive and no-longer produced Interface box.

    Casio FX850P/FX880P Manual  (11.3 Mb)

PDF version of the FX850P/FX880P owners manual.

Casio FX5800P

    Casio FX5800P Manual  (1.16 Mb)

Casio fx5800P users guide.

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Psion Workabout


    Remote Control for Leica TCA2003 (Demo)  (12Kb)

This is a demonstration version of a remote control program for the Psion Workabout.  The full version can be used to remotely operate a TCA2003 (or similar) via a serial cable.  The program includes basic remote measuring to a target (using ATR & Lock) for co-ordinate display, as well as Tie-Distance and Reference Line (Chainage & Offset) calculations.  At this time there is no facility to record the results.

This simulated version is for the Workabout only and has the instrument interface code removed.  All "measured" angles, distances and co-ordinates are displayed as zero.  Upload the text-file to the Workabout RS232 via Windows Terminal.

If you require the full free version, please contact me and show a working knowledge of the Leica remote control system or describe a suitable application or requirement.

    PSION Workabout Emulator  (896 Kb)

This emulator is useful when testing programs written for the Psion Workabout.  However, it only will only run under DOS.  This will NOT work in the DOS window through Windows.  Your PC must be able to boot to DOS directly.

    PSION Programming Reference Guide  (Link)

A web based programming guide for the Psion 3a and Workabout.

See also Windows Interface (Terminal)

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PDF Documents

To download, right-click the link and select "Save Target As..." .

National Structural Steelwork Specification

    5th Edition  (PDF 2.28Mb)

Latest edition of the Structural Steel "Black Book".

    4th Edition  (PDF 259Kb)

Previous version of the Structural Steelwork fabrication, inspection and erection tolerances.

Software Manuals

    StarNet v6 manual  (PDF 2.29 Mb)

The official StarNet v6 Reference Manual for the Standard and PLUS editions.

Construction (Design Management) Regulations

    CDM Regulations 2007  (PDF 165Kb)

Construction (Design and Management) Regulations 2007.

Corus "Blue Book"

     Corus Structural Sections  (PDF 1.26 Mb)

BS4 Part 1 (1993) and BS EN10056 (1999).  Dimensions and properties of Universal Beams and Columns in PDF format. 

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Internet Utilities

    Xenu  (292 Kb)

Xenu is a freeware "Broken-link" checker for your website...

    WS_FTPLE  (691 Kb)

WS FTP Lite, a free File Transfer Program (FTP) from www.Ipswitch.com.

    Pop-up Stopper v3.1  (477 Kb)

A useful utility to prevent unwanted advertising windows opening during browsing.

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After Hours

    Aquarium Screensaver  (1.2 Mb)

Serene Screensaver - including Licence Code

Windows Startup & Exit Sound Files 

A couple of Windows sound files to make life a little more interesting.

    Start Windows (HAL)  (43 Kb)

From the film 2001- Space Odyssey.  Computer HAL says: "I am completely operational and all my circuits are functioning perfectly".

    Exit Windows (Obi-Wan)  (51 Kb)

Obi-Wan Kenobi reminding you, "The Force will be with you... ...always".

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No programs or utilities may be downloaded from this site and sold without the permission of the author.

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