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Superposition method of fuzzy logic results of the evaluation conditions of the expression of mineralization

1Divisionoffavorablenesstooreforminginallarea4 expression to the effect of forming a favorable degree of expression of thematic maps are forming a favorable effect of the number of degrees by level, the grid cell size and shape, fill color, border and other favorable areas. Degree of mineralization by enabling the level if there are too many levels to ask the gap is too small, in the thematic map in forming a favorable area is not visible. If the level of division is too small, you can not fully reflect the combination of different ore-forming conditions,[link widoczny dla zalogowanych], the difference between the favorability. The author's experience, the expression is divided into eight or so better. Results of the size of the grid cell layer of the choices are two principles: a principle of superposition of data objects based on the size of overlap region of Anhui huge geological setting of 2005. Grid cell should be less than or close to the minimal overlap, so you can try to reflect the favorable degree of mineralization in different regions. But too often the smallest region of overlap,[link widoczny dla zalogowanych], so that the grid is too dense, too much computation. Another principle is based on the evaluation of the accuracy requirements. For example, if the results of map scale is 1 in 20 million, is desirable for the grid cell side length between 200m to 500m. Meet the accuracy requirements and computational evaluation of allowable case, select a smaller effect of grid cell can express more detailed, beautiful, richer level changes, the message more. Results grid cell layer is generally preferable to a square shape can also be obtained according to the actual situation of a rectangle or triangle. For example, if the working area of the data objects, such as the formation outcrop, fault buffers, mostly to the long north-south strip, the grid cell shape desirable north-south extension of the rectangle. Select the appropriate grid cell shape accuracy in the evaluation of the case to meet the reduced amount of calculation. Select the appropriate filling in different colors in different mineralization level of favorability of the grid cell,[link widoczny dla zalogowanych], can enhance the expression of results. Color should not be too deep, so as not to cover the map additional information. Cool low-level unit is appropriate, is preferable to warm the high-level unit in order to highlight the high-level unit. For example, the first-level unit filled with light red, light yellow filling the second-level units, light green,[link widoczny dla zalogowanych], light blue and other low-level unit filled with good effect. Metallogenic prediction map in the traditional polygonal or oval in the common circle forming favorable areas. I believe that the delineation of mineralization favorable areas is an artificial process, with subjective factors. Forming a favorable location and extent of area to be judged by the users, not by the cartoonist to judge. This mineralization in the favorability of this thematic map, the high-level color is the focus on the regional distribution of mineralization favorable area, do not delineated the boundaries of favorable areas in order to avoid the interference of the user.
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