(1) The isopleth of water and thermal product index not only showed better relation to thermal and water gradients but also to vegetation types.

(2) Both sides isopleth width of gravity anomaly linear structure signal is more narrow than that of gravity anomaly level total gradient.

(3) The importance of isopleth in determination of medium-temperature plastic working standard is discussed and the application trends of this investigation is further clarified.

(4) The isopleth of soil water surplus and deficit was scattered.

(5) The isopleth drawing of rectangular grids and the principles and techniques of adjusting isopleth control points are described in detail.

(6) Because there is a few wildcat well and data is lacking in the say[], the isopleth maps of the variable physical parameters can be obtained only using kriging.

(7) In addition, the method can suit to search and plot the other isopleth curves.

(8) In this paper, the tracing and the calculation method of the point of intersection of isopleth and net line are developed.

(9) Its gravitational field is on a density suddenchange belt of Bouguer anomaly isopleth.

(10) The principle of the boundary theory of phase diagrams is introduced and an experimental method of determining the isopleth section of phase diagrams of quaternary alloy system is described.

(11) Relationship between the concentration-area and the perimeter-area for the isopleth of elements.

(12) The correct algorithm for the absolute maximum and the isopleth of the ground level concentration of radiative fumigation(GLCRF)is presented.

(13) Based on many experiments and analyses, a new investigation on medium-temperature plastic working condition of carbon steel is proposed and a new concept, isopleth, is put forward in this paper.

(14) In engineering, it is generally required to draw a group of isopleth by the known function values of scattered points.

(15) The productivity formulas of branch horizontal wells which have or not have common joint are derived by applying conformal transformation and isopleth map of percolation resistance force.

(16) The characteristic factors are important to the gridding of isopleth map.

(17) Using dominant index law, the regions are further divided into 18 sub-regions by drawing and analyzing the isopleth map of the indexes.