EGM96
egm96_15.gtxA compact global grid with 15-arcminute spacing.
- Grid spacing
- 15′
- Coverage
- Global
Download GTXGTX · 4.15 MB
ROLAVI Downloads
Ready for your
next project.
Software, geoid models and AutoTags. The resources you need, from field capture to office deliverables.
01 / Desktop software
7-day free trial
Your field data.
Windows and Mac.
ROLAVIGeoStudio · 1.0.1
PPK, static GNSS and Stop & Go; photo and drone geotagging; and AR files for ROLAVICam and ROLAVIScan.
USD 150Perpetual license
Try all features free for 7 days.
02 / Height reference
A reference for
your project heights.
A GTX geoid file contains a grid of geoid undulation values (N). It lets compatible software convert GNSS ellipsoidal heights (h) to orthometric heights (H), according to the selected model.
Height conversion
H = h − N- h
- Ellipsoidal height
- N
- Geoid undulation
- H
- Orthometric height
GTX files for
- ROLAVIScan
- ROLAVICam
- ROLAVIGeoStudio
EGM2008
egm08_25.gtxA denser global grid with 2.5-arcminute spacing.
- Grid spacing
- 2.5′
- Coverage
- Global
Download GTXGTX · 149.33 MB
Grid spacing is not a measure of vertical accuracy. Select the reference model required by your project and use it consistently across your applications.
03 / Field resources
Print. Place.
Identify.
ROLAVI AutoTags
Your ROLAVI AutoTags in a single PDF: coded markers numbered 1 to 55, with one marker per A4 page and space for notes.
PDF · 97.7 KB
Print at actual size (100%) on A4 paper and keep the entire marker visible.
Keep your project moving.
Find guidance in the manuals or contact the ROLAVI team.