In InRoads there was an option to import data as depths instead of elevations. This is common practice for hydrographic data, as many dedicated programs have positive elevations being below 0, with elevations above as negatives.
ASCII files can be converted, but many of our surveys can have 1,000,000+ points, easier if the Text Import Wizard could define the vertical as DEPTH.
| Civil Product Used | OpenSite Designer, OpenRoads Designer, OpenRail Designer |