Digital mapping method for uneasily acquiring geographic element spacing gradient information in graticule
A geographic element and difficult-to-use technology, which is applied in digital data processing, maps/plans/charts, special data processing applications, etc., can solve problems such as practical limitations, and achieve the effect of high precision and wide geographical coverage
Active Publication Date: 2011-03-16
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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However, the actual situation is that it is difficult for people to understand the mechanism process required by this type of method, so the practicability of this method in actual drawing is greatly limited.
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[0026] Such as figure 1 Shown flow chart, taking digital soil mapping as an example, the concrete implementation method of the present invention is as follows:
[0027] 1. Soil is not easy to obtain geographic elements. Select easily accessible geographic elements (such as elevation, slope, aspect, etc.) that have synergistic changes with the soil in the mapping area, and determine the grid data resolution (such as 10m) according to the final mapping requirements. The existing easily accessible geographic feature data is converted into a grid format at this resolution to form an easily accessible geographic feature dataset;
[0028]2. Classify the soil types in the mapping area, that is, determine the spatial gradient of which soil types should be reflected in the generated digital map;
[0029] 3. For each soil type divided in step 2, establish a relationship curve reflecting the global synergistic change and local synergistic change between the easily accessible geographica...
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The invention discloses a digital mapping method with low probability of acquiring spatial gradation information of geographical elements under the graticule. The digital mapping method utilizes collaborative variation relationship between the geographical elements with low probability of acquiring and the geographical elements with probability of acquiring, and a digital map with low probabilityof acquiring the spatial gradation information of the geographical elements is generated and reflected through a data set of the geographical elements with probability of acquiring under the graticule. The invention adopts the technical scheme that the data set of the geographical elements with probability of acquiring forming collaborative variation with the geographical elements with low probability of acquiring is prepared; partition of the types of the geographical elements with low probability of acquiring is confirmed; a relationship curve of reflecting global collaborative variation and reflecting local collaborative variation is constructed for various types; a map in various types of fuzzy membership grades of the geographical elements with low probability of acquiring is generated by adopting the relationship curve and the prior data set; and a numeric attributed map and a type map of the geographical elements with low probability of acquiring are generated through synthesizing the map of various fuzzy membership grades. Therefore, the digital mapping method overcomes the problems that the sample size needed in the prior mapping method is great and the application conditions are harsh, and can be used in the fields of a mapping for natural resources and a mapping for risks of natural disaster.
Description
technical field [0001] The invention relates to a method for digitally mapping the spatial gradient information of geographical elements that are difficult to obtain under a geographic grid. The technical application fields are natural resource mapping, natural disaster risk mapping, and the like. Background technique [0002] The digital map that reflects the spatial gradient information of geographic elements is an important basic data required for natural resource management, land use planning, and disaster emergency management. In terms of the difficulty of digital mapping, some geographical elements that are easy to obtain can be obtained by modern observation methods such as remote sensing (such as terrain, many vegetation elements), or can be interpolated by data from a small number of observation points due to their strong spatial continuity Therefore, it is easier to map its spatial gradient information; in contrast, some geographical elements that are not easy to o...
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IPC IPC(8): G09B29/00G06F17/30
Inventor 朱阿兴伯特·E·詹姆斯秦承志李宝林裴韬杜斐
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS