The depth below your survey line to the magnetic or gravity sources under it, with the
position of each along the line, a spread, a bound on the top, a comparison and a written
opinion. See Reading your results.
Is a depth the depth to ore?
No. It is the depth to a geophysical source, a magnetic or density contrast. Where a body
has been drilled, the source can sit away from it.
How sure is a depth?
No confidence grade is issued. The report gives a spread (how well the estimates agree with
each other, not with the ground), the figures measured on synthetic sources for your line's
geometry, and an opinion for each source. Nothing in it promises how close a depth is to a
drilled depth.
Why was my line refused?
Usually the target depth does not suit the line: too shallow for the station spacing, or too
deep for the line length. The reason gives the figures to use. See
When a line is not processed.
Can I upload a Geosoft XYZ or GDB file, or a grid?
Yes. A grid (ER Mapper .ers with its data file, Geosoft .grd, or GXF)
is shown on the map and you draw the lines across it; its cell size sets the shallowest
target depth. See Grids.
Can I upload a derived channel, such as a vertical derivative or reduced-to-pole data?
No. Submit the measured field: total magnetic intensity or the vertical component of
gravity. A derived channel read as the measured field gives a wrong depth.
My file's coordinates are on a mine grid.
Contact support: we set up the conversion with you, using points
known in both grids.
The lines appear in the wrong place on the map.
The coordinate system is wrong. Choose the one your contractor's report names, in step 2.
See Coordinate systems.
Why can't I download my results yet?
Every result is reviewed by our staff before release. The job shows in review until
then.
How many lines can I submit at once?
Up to 60 in one selection. Each line is one job.
My line has a gap. What is processed?
The longest unbroken piece. The report says which part of the line it covers. Contact
support to have the other pieces processed.
Uploads expire two hours after the last change, and job files are kept for 7 days after their results are released (or after a job stops without results). To delete
a job sooner, contact support.