Presentation by Peter Vermeulen (Deltares) at the iMOD International User Day 2018, during Delft Software Days - Edition 2018. Tuesday 13 November 2018, Delft.

1. Release v4.3
Peter Vermeulen

2. Recent Developments
LLUR
Landesamt für Landwirtschaft, Umwelt und ländliche Räume
Geologischer Dienst Schleswig-Holstein
• Double precision coordinates
AGS
Alberta Geological Survey
• Extended queries for boreholes
• Artificial Boreholes
• GEN files
16 november 2018

3. Double-Precision
Example in single precision(7 significant) numbers.
120000.0,440000.0
Such a coordinate means that a maximal accuracy of 0.1 can be
obtained. Smaller values of <0.1 meter cannot be projected
accurately.
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4. Double-Precision
Example (ETRS89/UTM) in single precision (7 significant) numbers.
590000.0,5659000
Such a coordinate means that a maximal accuracy of 1.0 can be
obtained. Smaller values of <1.0 meter cannot be projected
accurately.
Usage of double precision enlarges
the number of signifcant numbers to 15.
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5. Double-Precision
iMOD uses a “shadow” coordinate
system
iMODMap
0,01000000,5000000
dx=100,dy=1001000100,5000100
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0,0
dx,dy

6. Double-Precision
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Choice between single- and double precision
– iMOD converts IDF files between single-
and double precision. Besides the
coordinates, the data will be double precision
too (doubles the size of an IDF-file)
IDF Files
Notes:
• If ASCII-files are imported iMOD “sees” whether
the coordinates need to be in double-precision
• If IDF Calc is used, a single- or double-precision is
inherited from the first mentioned IDF-file

7. Double-Precision
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ISG Files Choice between single- and double precision –
iMOD converts ISG files between single- and
double precision. Besides the coordinates, the
data (coordinates, elevations, cross-sections) will
be double precision, also additional attribute time
added to data for future usage

8. Double-Precision
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iMODFLOW:
Choice between single- and double
precision
Running the model (runfile)

9. GEN-files
Current GEN-file
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1
245143,516806
245114,516811
245095,516796
245073,516776
245027,516753
245004,516739
244994,516730
244938,516700
244927,516697
244917,516698
244903,516692
244895,516687
244887,516673
244883,516665
244834,516632
244815,516595
END
END
id,province,capital
1,Drenthe,Assen
2,Flevoland,Lelystad
3,Schiermonnikoog,Schiermonnikoog
4,Ameland,Nes
5,'Het Rif',-
6,Terschelling,West-Terschelling
7,Friesland,Leeuwarden
8,Vlieland,Oost-Vlieland
9,Richel,-
11,Gelderland,Arnhem
12,Rottemerplaat,-
13,Rottemeroog,-
14,Zuiderstrand,-
15,Simonszand,-
Drawback
Very slow drawing
huge GEN-files

10. GEN-Files
ASCII and BINARY GEN-files both supported, however, for several
features in iMOD it is obliged to use the binary format. iMOD offers
the possibility to convert ASCII GEN-files into BINARY GEN-files.
16 november 2018
New BINARY format (*.GEN)
includes coordinates (double
precision) and attributes in a
single file.

11. GEN-files
New BINARY format (*.GEN) displays much-quicker and performances increases if zoomed in
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140MB

12. Resizable and movable scalebar (interactively)
Clipboard takes the selected area
bounded by the axes automatically
Movable axes
(interactively)
Extra’s

13. - Capable of sorting IDF files in the iMOD
Manager based upon keywords, in this
manner it is easy to sort a list as
TOP_L1.IDF, BOT_L1.IDF, TOP_L2.IDF,
BOT_2.IDF etc.
- Select files in the iMOD Manager via a
search string, this is handy to select
multiply files to be given a similar legend
Extra’s

14. Extra’s
Particle Tracking supports the
usage of IPF files (xyz) for
starting points
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15. Extra’s
Interactively Position 2D Layout of line for cross-section
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16. Extra’s
Restored Pumping Tool
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