Grid Machine 6.81 (released Jul. 5, 2009)
by Johannes Weigel
weigel at ecogis de

Beginning with release 5.00, Grid Machine is licensed as SHAREWARE. This means, all functions of the popular ArcView extension for multiple grids are still available, but not for multiple grids. Besides, a "Register me"-screen opens up each time You activate Grid Machine. If You want to get full functionality and no nags, You have to buy a license key (prices see order form below). Registration also includes email support in questions concerning Grid Machine.

Since version 6.00 Grid Machine the runtime of the demo version is limited to a 90 days trial period. If you wwant to use Grid Machine after the expiration of this period, you have to register the software.

What do I get if I register Grid Machine?

Be aware that it is not allowed to use the demo version of Grid Machine with commercial intentions. Grid Machine is not expensive, and that's what You get for Your money:
1. Full functionality. The evaluation only works with one grid at once.
2. No splash screen at the beginning that reminds You to register Grid Machine.
3. Free updates till further notice, yet at least till Dec. 31, 2008.
4. Optional information about Grid Machine updates.
5. Free email support concerning Grid Machine functionalities till Dec. 31, 2008.
6. Legal use of Grid Machine for commercial purpose.
7. Legal redistribution of the Grid Machine demo version.
8. A good conscience, a big "Thank You" and the good feeling that development can continue.
9. Use of Grid Machine after the expiration of the 90 days trial period.
10. Have more time for your hobbies by using the batch functionalities of Gridmachine.

How can I register Grid Machine?

You have three options to register Grid Machine (price codes are shown below):

Option 1 ( You can purchase Grid Machine at <> with different options for payment. Please note that the student version is NOT available at Click on the button below to order Grid Machine from (secure connection).

Order Gridmachine

If Your browser has difficulties to open up a secure connection, You can also open up the order site with a usual connection. To do so, click here. Because the information sent is not being encrypted, You should make use of the telephone order option at

Please register Grid Machine at if You want to purchase a single user license. The single user license is limited to the use of Grid Machine on one single computer only. If you want to use Grid Machine on more than one computer (provided that the same copy of ArcView is installed on all machines), you can purchase a network license. Click on the link below to purchase a network license of Grid Machine:

Grid Machine network license

Option 2 (PayPal): You can purchase Grid Machine at PayPal with various options for payment.
Please note that the student version is NOT available at Click on the button below to order Grid Machine from PayPal (secure connection). Please insert the exact name of the licensee (check spelling) AND your Gridmachine user ID into the dialog field "Message to the vendor" to ensure fast processing. The Gridmachine user ID is an 8 digit number which you find in the registration dialog that appears always when you activate an unregistered version of Grid Machine.

Option 3 (ECOGIS):
The student license is only available directly from ECOGIS. It can only be charged by bank transfer, cash or cheque, NOT by credit card. Please send an email to me (and attach a proof of Your student status) to recieve my international bank account information. The email adress is:

weigel at ecogis de

The student license provides the same functions as the full license, but can not be used for commercial purposes. Of course You can also purchase the single user license and the network license directly from ECOGIS.
You are asked about Your Grid Machine user ID when You fill in the order form. You can find it in the "register" dialog box of Grid Machine. Don't forget to fill in this number, because it is necessary to create Your license key!

How much is the registration fee for Grid Machine?

US$ prices are subject to exchange rates. Due to the instability of the course they are not provided here anymore. Please use or PayPal to buy Grid Machine in US$.
German customers have to add the national VAT (19 %). Customers from EU countries have to specify their EU VAT number; otherwise they also have to add 19 % VAT. All prices are valid through December 2004. Order and shipping take place via email. In case of shipping as CD-ROM via mail a supplement of EUR 20,- is added to the price.

Grid Machine network license (*): EUR 300,-
Grid Machine single user license:
EUR 150,-
Grid Machine student/additional license:
EUR 75,-

*) The network license is valid on all computers with the same ArcView serial number.

What is Grid Machine?

You know X-Tools? Grid Machine is X-Tools for grid themes. In ArcViews Spatial Analyst the options to work with grids are very limited, especially if you have requests for multiple grids. Even simple actions (like copy, rename, import, export) are only provided for single grids. Gridmachine offers a lot of helpful tools for the work with ArcView/Spatial Analyst, like the above mentionend, but also some features (like the Cutting Machine, the Geocoder or the Nodata changer), that aren't even provided for single grids by Spatial Analyst.
The current version contains the following features:
Additionally it contains an About-Script (Version control and rights), a feature to hide/show the Grid Machine specific buttons separately (!) and an Update-Script (which connects you to the internet to download a newer version of Gridmachine).

Please note that Grid Machine is NOT FREEWARE. If You use Grid Machine regularly, You have to buy a license key.

What do I need?

You need a Windows system (32 bit) with an installation of ESRI ArcView GIS 3.x and Spatial Analyst.
If you are working with Windows XP, check that you have the appropriate XP patch from ESRI installed.

This software is not compatible with ArcView 8.x or 9.x! Be sure you have an installation of ArcView GIS 3.x on your system!
Remind that Grid Machine is an extension for ArcView GIS 3.x. If you only have ArcGIS (ArcView 8/9), then you have to do a parallel installation of ArcView 3 before you can use Grid Machine. If you are using a network installation of ArcView, please take a look at the FAQ to get a solution.

How do I install Grid Machine?

Click the link below to download the Grid Machine installer:

Grid Machine installer

Execute the file gridmachine.exe. The extension will be installed into the proper ArcView installation directory.

Activate Gridmachine in the Extension dialog (-->Program -->Extensions) and open a new view.
Gridmachine adds a new Menu and several buttons to your View menu bar.
It contains all the instruments mentioned above.

Remind that Grid Machine is an extension for ArcView GIS 3.x. If you only have ArcGIS (ArcView 8/9), then you have to do a parallel installation of ArcView 3 before you can use Grid Machine. If you are using a network installation of ArcView, please take a look at the FAQ to get a solution.

Version history:

- Grids to Images: Batch convert multiple grids to images (tif, jpg, bil, bsq, bip)

- Copy/Move by quota (every second, third etc. grid.). E.g. useful to decrease amount of multiple grids specifying time series.

- Improved work with single grids. Input and output directories can be identical.

- Bug fixed (mathematical!) in Minimum calculation of Maximum gridder
- Minimum/maximum calculation also creates a grid that contains the information, from which grid the minimum/maximum values come from (encouraged by Aaron Dick, Spatial Analysis Lab., Univ. of Arkansas/Monticello)

- Legend created for information grid in Maximum/Minimum gridder containing the file name of the source grid

- Added spaces in the Menu
- Added buttons for several features
- Added Hide/show button bar feature

- Upgraded Hide/show functions with a dialog. You can add/remove gridmachine buttons separately by clicking checkboxes. Very nice feature ;-)

- Extended Hide/show dialog: Contains Hide/show, Update and About function now

- Bugfix: Info (About) button could not be set in 3.7

- Info text as a dialog now.

- Direct multiple import of Surfer ASCII grids as ArcGrids. The feature is implemented in the Import Machine which offers You several features (ArcView or Surfer ASCII grid, import as floating point or integer). Try that!

- Export function didn't work in 4.00 for unknown reasons. Bug fixed now

- Direct multiple export of ArcGrids as Surfer ASCII files. Feature is implemented in the dialog of Export Machine, similar to Import Machine.

- Import/Export buttons didn't show up in versions 4.x. Bug fixed now.

- Copy/Move functions integrated in a dialog.

- Direct E-mail and Web-contact to the developer via "About"-dialog.

- Improved Renaming Machine. Contains an intuitional dialog now which is really a nice one.

- Renaming button didn't show up in version 4.30. Bug fixed now.
- Altered license aggreement: Grid Machine is licensed as POSTCARDWARE now (see below)!

- Comprehensively extended export functions: Export dialog now includes (additionally to ArcView and Surfer ASCII formats):
- ArcView binary data (*.flt)
- DBase tables (*.dbf)
- Text files (space, comma or tabulator separated; other separators optionally)
Remind that all export functions work for multiple grids!

4.50 (Dec. 09, 2002):
- New feature "Grids to shapes": Conversion of multiple grids to point shapes or polygon shapes (apply one grid legend to multiple grids and then convert them to shapes)
- Conversion to line is planned to be implemented soon!

4.51 (Dec. 16, 2002):
- Grid to shapes button didn't show up in version 4.50. Bug fixed now.
- Changed appeareance of info banner.

4.52 (Feb. 14, 2003):
- Bugfix in export to Surfer ASCII grid: Nodata values had not been recognized by Surfer (Thanks to M. Hawkins for reporting)

5.00 (Mar. 11, 2003):
- Grid Machine can be registered to enable further development.
- Export to dBase table works excellent now (tested successfully with a grid containing 1.6 Mio points)
- The OS-specific look of ArcView can be changed in the registration dialog.

5.01 (Mar. 12, 2003):
- Several minor bugfixes

5.02 (Mar. 13, 2003):
- Improved export of grids as text files (aster and more stable now, also for large grids).
- New option in export as text files (xyz data): Select comma instead of point as floating point character.

5.03 (Mar. 21, 2003):
- Grid to polyline implemented for integer grids now with several options.

5.04 (Apr. 14, 2003):
- Minor bugfixes ("forgotten" debug dialog in Grid to polyline; purging temporary objects before operations now)
- Stream to polyline implemented for integer grids.

5.10 (Apr. 16, 2003):
- Implemented new feature 'Grid Mosaic'  to fractionize grids into equally sized pieces with many options

5.11 (Apr. 22, 2003):
- Inconspicuous but fatal bug in Grids2Shapes when clicking the 'Browse'-Button (fixed now)

5.12 (Apr. 25, 2003):
- Here they are again: Images on all buttons had been lost in version 5.11

5.13 (May 5, 2003):
- Minor bugfix in Grid Mosaic (error when cancelling a file dialog).

5.20 (May 28, 2003):
- New feature: Grids to isolines added to Grid2Shapes dialog.

5.90 (July 21, 2003):
Extensively increased functionalities in import machine since last version:
- Load and visualize imported grids
- Import point shapes as grids
- Import dBase tables with coordinate fields as grids
- Import tabular ASCII data with many options as grids (fixed width, separating character, spaces or tabulator characters as separators)
- Interpolate grids optionally with many options before importing
- Allow comma instead of point as floating point character in coordinate and value fields
- Convert non-numeric coordinate and value fields into numeric fields
- Automatically find and preserve best fitting cellsize
- Show and test data before processing

5.91 (July 23, 2003):
- Bugfixes in Grids to Shapes dialog. Errors occurred when trying to create polygon shapes
- New options in Grids to Shapes: Load and show themes

5.92 (July 25, 2003):
- Minor bugfix in Grids to Shapes

5.93 (July 30, 2003):
- Bugfix in Grids to shapes (isoline)

5.94 (Aug. 19, 2003):
- Implemented option to import Surfer grids with deviant X- and Y-cellsize

5.95 (Sep. 03, 2003):
- Bugfix in Import machine (Point shapes): Import failed with non-automatic cellsize (fixed).

5.96 (Sep. 18, 2003):
- GRASS ASCII Grid import (*.gra) implemented in import dialog.

5.97 (Oct. 6,2003):
- Cosmetic changes in import dialog (tabular data): Bigger selection boxes for field names
- New import filter: Import of binary data (*.flt) enabled
- Changed name of Grid Geocoder to Grid Georef Assistant

5.98 (Oct. 8, 2003):
- Export filter implemented for GRASS ASCII raster (*.gra)

6.00 (Feb. 2, 2004):
- Trial limit of 90 days implemented for this and all future unregistered versions of Grid Machine
- New functionality: Recalculate grids. With the recalculation dialog you can do any of the following operations with various options:
- Resample grids with different algorithms (nearest neighbor, bilinear interpolation, cubic convolution)
- Aggregate grid cells by mean, median, maximum, minimum and sum of cell neighbors
- Slice grids into pieces (equal area or equal distance)
- Filter grids by low pass (blur) or high pass (sharpen) filter
- Reclassify grids by their legends

6.10 (Feb. 10, 2004):
- New functionality: Union grids. Do any of the following operations with grids from your view or from files:
- Merge grids: Add multiple grids to a grid
- Mosaic grids: Create one grid from multiple grids with smooth transitions
- Combine grids: Intersect grids
- Pick grids: For each cell of one grid, this feature returns the cell value from the Grid in a list of grids whose position is equal to the cell value.
- Sample grids: Samples a List of Grids in using only the cells with values other than No Data in a specified grid. The output table will have a field for each grid that will hold the value of each sample. There will be a separate record in the table for each cell in the specified grid that has a value other than No Data

6.11 (Feb. 11, 2004):
- New import filters:
- Batch convert BIL, BIP and BSQ images to grids
- Batch convert 30meter SRTM data (*.hgt-files) to grids

6.12 (Feb. 16, 2004):
- Bug fixed in SRTM import of negative heights
- All SRTM data (30 m and 90 m) supported now.

6.13 (Feb. 17, 2004):
- Final bugfix in SRTM import: Nodata values are interpreted correctly. Works stable now.

6.14 (Mar. 18, 2004):
- Fixed bugs in several dialogs when choosing active themes as input themes.

6.15 (Mar. 18, 2004):
- New function in Grids to shapes: Create watersheds (i.e. catchment areas) from grids.

6.16 (Apr. 21, 2004):
- Fixed bug ("Error calling unlink for file ...") in export module

6.17 (May, 5, 2004):
- Fixed bug in Grid2Shapes: Create polygons from active GThemes is working now with active legends.

6.18 (May 6, 2004):
- Correction in SRTM import: Shift of a half cellsize eliminated (thanks to M. Miller)

6.20 (May 6, 2004):
- New feature: Transform grids (former Georef Assistant)
- Move (Shift), rotate and expand grids by absolute and relative values.

6.21 (May 17, 2004):
- Legend file can be specified for imported grids
- Several minor bugfixes

6.22 (Jun. 17, 2004):
- Bugfix in import machine (exact width mode)
- Distribution of Grid Machine as self installing executable file

6.30 (Jun. 22, 2004):
- Import filter for SPOT Vegetation data. The data can be obtained from the "Free VEGETATION distribution site" (<>). You need the program CROP VGT from the same website to interpret the HDF header and extract the region of interest. It is recommended that you specify VGT as file extension for the output file. For more information on the SPOT VEGETATION program plese visit the SPOT VEGETATION homepage (<>).

6.31 (Jun. 24, 2004):
- Merging and mosaicking support operations with up to 2400 grids now

6.32 (Jun. 29, 2004):
- In some cases the installer aquired the wrong directory (fixed now).
- Surfer import: In some cases the first line of data had been skipped in surfer import (fixed now).

6.33 (Jul. 5, 2004):
- Minor bugfix in Fractionize grids (choose input grid from view)
- Minor bugfix in Union grids (error in log file)
- Logfile can be examined when errors occurr.

6.40 (Aug. 4, 2004):
- Replaced the former 'Cut grids' by the function 'Extract parts of grids'. There is a new dialog with several options (extract by mask, selection, attributes, polygon, mouse rectangle or exact corners). The function 'filter grids' will be fully integrated in the dialog soon.

6.41 (Aug. 5, 2004):
- Got rid of several non-fatal segmentation violations that occurred after finishing of operations
- 'Hide/show dialog' is now called 'Preferences' dialog. All menu entries can be defined as buttons now. Path for log file can be specified.
- SRTM import failed using the temporary folder as output folder (fixed now)

6.42 (Aug. 9, 2004):
- Fixed a bug that occurred under certain circumstanced when activating Grid Machine.

6.43 (Aug 10, 2004):
- Fixed a bug in Grid2shapes that duplicated the file extension (.shp.shp) in certain cases.

6.44 (Aug. 11, 2004):
- Fixed a bug that caused a Grid error when the temporary folder has been chosen as output folder
- Fixed a bug that caused ArcView to crash when a faulty path was chosen for the logfile

6.45 (Aug. 16, 2004):
- Fixed the bug that caused the 'Could not create grid' error message in SRTM import
- Two new features in the preferences dialog: 'Change log file' and 'Create directory'

6.46 (Aug. 24, 2004):
- Bugfix: Extract grids by polygon theme using active grids caused an error: 'Could not find the specified polygon theme'

6.47 (Sep. 20, 2004):
- Export to Text/dBase: No point ID is created anymore
- Export to Text/dBase: Value is placed after coordinate fields
- Export to dBase: Fixed the bug "Error calling unlink for file temporary.shp"
- Union grids: Fixed a (non-fatal) segmentation violation that occurred in some cases.
- New license model: Single user license based on computer name. Previous licenses are upgraded to network licenses

6.48 (Oct. 6, 2004):
- Improved 'Extract grid by shape' functionality

6.49 (Oct. 19, 2004):
- New option in "Fractionize grids" dialog: Specify overlapping distance for output grid tiles
- Fixed several minor bugs in "Fractionize grids" dialog

6.50 (Oct. 25, 2004):
- New option in "Recalculate grids" dialog: Define a batch map calculation on multiple grids
- Added button to specify a legend file in "Recalculate grids" dialog
- Added request in "Import grids" dialog when automatic cellsize results in a large number of output cells (>1000000)

6.51 (Nov. 1, 2004):
- New function in "Import grids": Convert active point theme to grid
- Fixed bug in "Import grids": Importing point themes sometimes failed to identify field names of the feature table
- Fixed bug in "Fractionize grids": Fractionizing failed when base coordinates were not specified

6.52 (Nov. 3, 2004):
- Fixed a few bugs in "Recalculate grids"
- New function in "Recalculate grids": Fill gaps (interpolate nodata values)

6.53 (Nov. 4, 2004):
- "Recalculate grids" reported "identical field names" when using active grids (fixed)
- "Reclassify by legend" caused an error: "Expected a filename, got a legend" (fixed)
- "Import XYZ data" failed when a data line was unexpectedly short (fixed)

6.54 (Nov. 30, 2004):
- Recalculate grids: Reclassification also works with floating point grids now

6.55 (Dec. 20, 2004):
- New import filter: Supports SRTM-30 *.dem files now

6.56 (Dec. 23, 2004):
- New function in Recalculate: Change values. Similar to former Nodata changer, but more powerful. Nodata changer is obsolete now.

6.57 (Jan. 05, 2005):
- New import filter: Landsat TM L1G-files can be imported now. L1G files can be downloaded from the Earth Science Data Interface (ESDI):

6.58 (Jan. 12, 2005):
- Added support for older Landsat TM images (file extension: *.B1, *.B2 etc.) to TM import filter
- New option in Landsat TM import: UTM parameters can be specified

6.59 (Feb. 14, 2005):
- Change in Grid Statistics: Count more than one single value
- Several minor bugfixes

6.60 (Feb. 15, 2005):
- Tiff images get the correct colors when imported as grids!

6.61 (Mar. 15, 2005):
- Implemented new import filters: US DMA DTED (*.dt1) and USGS DEM data (*.dem)

6.62 (Mar. 21, 2005):
- Import machine: Interpolation unavailable in version 6.61 (fixed)
- Extract parts of grids: Extract by shape more comprehensive now; supports multiple shapes, island polygons and also polylines and points

6.63 (May 23, 2005):
- Changed some annoying behaviour of file dialogs. Now the dialogs remember the latest files and paths specified.

6.64 (May 24, 2005):
- Active themes can be chosen for Image to Grid import (remind that this import keeps the original colors of the image)
- Minor bugfixes in file dialogs.

6.70 (Jun. 10, 2005):
- New import utility: Import netCDF files (CDL notation; description at: <>)

6.71 (Jun. 13, 2005):
- Fixed a bug in version 6.70 that caused ASCII data import (xyz, csv etc.) to fail.

6.72 (Jun. 20, 2005):
- Fixed two bugs in "Extract parts" and "Batch recalculate" concerning the analysis environment.

6.73 (Jul. 13, 2005):
- New export filter: 3dem terrain model (txt file with header)

6.74 (Jul. 18, 2005):
- Minor bugfixes in data import
- New import functinality: Support of ER mapper floating point files (ERS)

6.75 (Jul. 20, 2005):
- Import functionalities (dbf, shp, txt...) support projected views now

6.76 (Jul. 29, 2005):
- Fixed a bug in "Extract by shape" ("Variable theFThemes not initialised")

6.77 (Sep. 14, 2005):
- Fixed a bug in "Import machine" (Input surfer grids did not work)

6.78 (Feb. 8, 2005):
- Fixed a bug in "Fractionize grids" (update of coordinates)
- Added new button ("create directory") to most of the dialogs

6.79 (Sep. 20, 2006):
- Fixed a non-fatal "Segmentation violation" error in "Union grids"

6.81 (Jul. 5, 2009):
- Minor bugfixes
-New feature in Maximum gridder: Build total sum of multiple grids

Bugs and hints:

- Surfer import: Make sure that you are processing Surfer ASCII grids, because the import function doeas not work with binary grids (both have a *.grd file extension). Choose the appropriate option when saving your data in Surfer.
If X- and Y-values differ too much, your grid may be shifted. In this case, save Your data as a *.dat file from Surfer and import it with interpolation using Grid Machine.
Before You process a large amount of grids, spot check one or two, because the analysis environment can affect Your output.
- Connection to the internet may fail on some computers, depending on Your network and security preferences. Be aware that Gridmachine does NEVER submit any data of any kind when You open Your web browser from a button in any Grid Machine menu or dialog.
- Don't use file names with blanks as input or output paths, because this may cause errors.

If You find unknown bugs, please send a message to the author.


QUESTION: Is there are a restriction on ‘Importing’ files with names longer than 13 letters? As I get an error when that number is exceeded.
ANSWER: Grid file names in ArcView cannot contain more than 13 characters. Because Import machine uses the input file names as grid file names, the same limit is valid for input file names. This problem is solved in newer versions, as the user is asked to shorten the filenames in that case.

QUESTION: Will the license keys be valid when/if I uninstall and reinstall GridMachine on another computer?
ANSWER: The license key is based on Your Grid Machine user ID and Your user name. It remains valid if You uninstall, reinstall or update ArcView or Grid Machine, as long as You work with the same copy of ArcView.

QUESTION: Is there an actual limit to the number of files that I can import/export/rename/convert/etc.. upon purchasing the license? Or is it truly unlimited?
ANSWER: The only known limit except Your hardware limitations is the ESRI-specific limitation of grid directory contents. I made a test which passed 3333 grids but failed with 3334. If You have many more grids than this number to process with the same procedure, I can think about a solution (like allocating grids in different directories), but I don't think anyone put this amount of grids into one directory yet.

QUESTION: What does the UserID I send you depend on?
ANSWER: The user ID depends on an algorithm based on the last 8 digits of Your 12-digit ArcView
serial number, so it is not possible for me to identify Your ArcView serial number.

QUESTION: Is there a restriction on some characters in files names, such as “.”? As I also get an error when filenames happen to contain that.
ANSWER: There are the common restrictions on windows file names (no question tags, quotes, colons, slashes, backslashs). Additional restrictions are blanks and file names with more than one point (I can improve error handling in these cases). Most special characters, like umlauts (also unicode) are allowed for text and grid file names.

QUESTION: Can I use Gid Machine on another computer with a different user ID?
ANSWER: The Grid Machine license is a single license for one person on one computer. Nevertheless, if You want to use Grid Machine on a second computer with the same copy of ArcView installed, You will have the same user ID on that machine. If You want to use Grid Machine with Your user name on a machine with a different copy of ArcView installed, You have to pay a small fee to receive a new license key. Check for prices.

QUESTION: Will my license key be valid for Grid Machine updates?
ANSWER: Yes, it will be valid at least till December 2008. There will be no need to fill in the registration dialog a second time, unless I get a piracy problem.

I want to install Grid Machine, but it says, no registry entry for ArcView could be found.
ANSWER: If you do not have ArcView GIS 3 installed (ArcView 8/9 is NOT an update but a different program), install ArcView first. If you have ArcView GIS 3 installed and still get that error message (this may happen if you have a network installation or if somebody moved the installed files), you can create the missing registry key manually with "regedit": Create a new folder in your registry at HKLM\SOFTWARE\ESRI\ArcView GIS Version 3.0\CurrentVersion. Create a new key of type REG_SZ and name it "Path". Insert the full path to your arcview.exe file (like c:\ESRI\AV_GIS30\Arcview\bin32) and run the installer again.

QUESTION: I get the error message "SmartHeap Library out of memory. Please free some memory, then choose retry". What can I do?
ANSWER: Smartheap is an auxiliary program for RAM management in Windows 2000. You get this message when no RAM can be allocated anymore. What you can do is increase your virtual memory and/or insert more RAM (the maximum that can be handled by Windows 2000 is 4 GB RAM and 4 GB virtual memory). Process less files at once. Restart ArcView after processing large files.

QUESTION: Will there be a version of Grid Machine for ArcView 8.x/9x?
ANSWER: There is no such version planned.

QUESTION: Does Grid Machine offer the ability to extract all possible n meter x n meter grids from a larger grid?
ANSWER: You can do that with a registered version of Gridmachine (see for registration information and prices). Be sure your view properties are meters. Your grid cellsize should be a factor of 100. Open the dialog "Fractionize grids", choose the method "Extent of each tile in map units", type the desired output size into the appropriate text box, choose your grids, specify an output directory and go.

QUESTION: When I process a "Union grids", operation, my output grid does not have the desired extent. It is too small and/or the cellsize is too big.
ANSWER: Open the "Properties" dialog in the "Analysis" menu. Then specify "Union of inputs" as Analysis extent and "Minimum of inputs" as Analysis cell size. Then execute the operation again.

Examples for the use of Grid Machine:

- Biological application (University of Alberta): Locus Allele Frequency
- Weed prediction: WISP (Weed Invasion Susceptibility Prediction)
- Greetings from Environmental Science for Social Change, Philippines.
- 3D Landscape and rainfall modeling with the Dhufar GIS 1.0
- Changes of Multiple Metal Accumulation (MMA) in New Orleans Soil: Preliminary Evaluation of Differences between Survey I (1992) and Survey II (2000), in: International Journal of Environmental Research and Public Health 2005, 2(2), 308–313



last edited: Johannes Weigel, Jul. 5, 2009