DSD-INT 2018 iMOD version 4.3 double precision big coordinates - Vermeulen
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The document discusses the release of version 4.3 of a software by Peter Vermeulen, focusing on the use of double precision coordinates in various file types such as idf and isg for improved accuracy. It highlights the conversion between single and double precision, the new binary format for gen-files, and additional features like sorting and interactive tools in imod. Notably, it addresses the limitations of using singular precision for accuracy in coordinate representation.
DSD-INT 2018 iMOD version 4.3 double precision big coordinates - 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. 16 november 2018
- 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. 16 november 2018
- 5. Double-Precision iMOD uses a “shadow” coordinate system iMODMap 0,01000000,5000000 dx=100,dy=1001000100,5000100 16 november 2018 0,0 dx,dy
- 6. Double-Precision 16 november 2018 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 16 november 2018 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 16 november 2018 iMODFLOW: Choice between single- and double precision Running the model (runfile)
- 9. GEN-files Current GEN-file 16 november 2018 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 16 november 2018 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 16 november 2018
- 15. Extra’s Interactively Position 2D Layout of line for cross-section 16 november 2018
- 16. Extra’s Restored Pumping Tool 16 november 2018