Pipe (instrument) Pipe (instrument) A pipe is a tubular wind instrument in general, or various specific wind instruments. The word is an onomatopoeia, and comes from the tone which can resemble that of a bird chirping. Fipple flutes are found in many cultures around the world. Often with six holes, the shepherd's pipe is a common pastoral image. Shepherds often piped both to soothe the sheep and to amuse themselves. Modern manufactured six-hole folk pipes are referred to as pennywhistle or tin whistle. The recorder is a form of pipe, often used as a rudimentary instructional musical instrument at schools, but so
Esri TIN Esri TIN The Esri TIN format is a popular yet proprietary geospatial vector data format for geographic information system (GIS) software for storing elevation data as a triangulated irregular network. It is developed and regulated by Esri. The Esri TIN format can spatially describe elevation information including breaking edge features. Each points and triangle can carry a tag information. A TIN stored in this file format can have any shape, cover multiple regions (e.g. islands) and contain holes (e.g. lakes). In 2007 a reverse-engineered description of Esri TIN format came to light. Since then, the Virtual Terrain Project, an open-source