The arrow points to the location of the MOC image. The base map is a portion of Viking 1 orbiter image 494a50. North us up, illumination is from the left.
North is approximately up, illumination is from the lower right.
Arrows indicate two dark lineations, each about 2-3 pixels wide. North is approximately up, illumination is from the lower right. You may need to adjust the images for the gamma of your monitor to insure proper viewing. This MOC image is made available in order to share with the public the excitement of new discoveries being made via the Mars Global Surveyor spacecraft. Release of this image does not constitute a release of scientific data.