[Mars-sim-users] Bug Report: USGS Map Mode: globe locations/map borders do not match

[Allen B. <all...@st...>]

User: Allen Bryan, delurking and apologizing if this is a repeat post.

Bug Reporting on Sourceforge: Has a bug itself, reported to Sourceforge.

When my bugs are submitted, I get "ERROR getting bug_id".

System: Windows ME, Sun JRE 1.3, MarsProject 2.71.

When in USGS mode, the position of the lights indicating rover and base
locations on the globe of the Mars Navigator Tool do *not* match the
locations of said rovers and bases on the map displayed. By this I mean
the following:

* If I see a base dead center on the map, the green dot of light
representing said base appears to be in the lower right corner of the
green box denoting the map area. Similar offsets can be observed when
the base is at upper left, etc.; in general, the position of the base or

rover relative to the green box is southeast of the position expected
from the large map.

* This condition exists when a base is centered (by clicking on the
bullseye found at Base UI-->Location).

* The centering of bases and rovers on a map is not defective in USGS
Map Mode.

* Four possible failure modes exist:

(a) The map drawn and the location on the map are correct; the location
on the globe is correct; the map border on the globe is offset to the
northwest.

(b) The map drawn and the location on the map are correct; the map
border on the globe is correct; the location on the globe is offset to
the southeast.

(c) The map border and location on the globe are correct; the map drawn
is correct; the location on the map is offset to the southeast.

(d) The map border and location on the globe are correct; the location
on the map is correct; the map drawn is offset to the northwest.

I believe that, due to the internal consistency of the co-ordinates
between the "Go There" search tool, the "Center on unit" tool, and the
reported co-ordinates, possibilities (c) and (d) are unlikely to be
true. I therefore believe that possibilities (a) and (b) should be fully

investigated. If (a) is correct, for instance, a simple offset of a few
pixels is sufficient to solve this bug.


Your friendly neighborhood nitpicker
Allen Bryan