Determine Which Type of Crown Molding to Use. Wood molding can be expensive. You may want to use molding made of MDF, which is a combination of wood and resins and comes pre-primed and ready to paint. If you decide on MDF, though, don't use it in a kitchen or bathroom as the humidity can cause it to warp.
First, what it is not. It is not a singular form of the word data which some of you may have heard. Data is a collective noun and the plural of datum is datums when used in a geophysical sense. For GPS, navigation, and geophysical use a datum represents a reference point from which you can measure things.ime is used in your gps to calculate position. The time used by your gps is a special gps time that is transmitted as part of the satellite message. In addition the satellite transmits information in the form of leap seconds adjustments to permit your unit to adjust the clock display to agree with standard UTC time.
From Wikipedia, the free encyclopedia. The North American Vertical Datum of 1988 (NAVD 88) is the vertical control datum of orthometric height established for vertical control surveying in the United States of America based upon the General Adjustment of the North American Datum of 1988.AVD 88 replaced the National Geodetic Vertical Datum of 1929 (NGVD 29), previously known as the Sea Level Datum of 1929. The elevation difference between points in a local area will show negligible change from one datum to the other, even though the elevation of both does change.