Thematic map sheet planning method

A technology of thematic maps and map sheets, which is applied in the field of thematic map map sheet planning, can solve the problems that map sheet planning methods are not easy to quantify, and the results of map sheet specifications are different, etc., to achieve strong practicability, strong versatility, and high efficiency Effect

Active Publication Date: 2020-07-10
CHINA RAILWAY DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for planning a thematic map, aiming at the defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A thematic map requires coverage, that is, the target geographic scope, covering the entire territory of Jinan City, the southern part of Zhangqiu City, the northern part of Tai'an City, the entire territory of Laiwu City, and the southern part of Zibo City in Shandong Province. The small area between the lines. The required drawing width is 81cm.

[0049] Adopt a map-based plan, such as figure 1 shown, including the following steps:

[0050] Step 1: Determine the initial scale

[0051] According to the target geographical range, draw an initial rectangle to include the administrative divisions in the thematic information; measure the actual distance of the short side of the target corresponding to the initial rectangle to be 74.9km, according to the definition of the scale, divide the actual distance of the short side of 74.9km by the map The map size is 81cm, and the calculated initial scale is 1:92469;

[0052] Step 2: Determine the scale of the drawing

[0053]...

Embodiment 2

[0057] A thematic map requires that the main streets of the city can be distinguished, and the geographical span of the short side of the map is less than 20 kilometers. The thematic information is a 52-kilometer designed railway, and the scale of the drawing is required to be 1:25000.

[0058] In this thematic map, the controlling thematic information is a graphic effect, and the scale-based planning is adopted, such as figure 2 shown, including the following steps:

[0059] Step a: Determine the initial map frame

[0060] According to the control conditions combined with the scale of the map to determine the reference geographical range, draw the initial rectangle to determine the target geographical range, measure the actual distance of the short side of the target to 18.5km, multiply the actual distance of the short side of the target to 18.5km and multiply the scale of the map to 1:25000 to obtain an initial map size of 74cm ;

[0061] Step b: Determine the map size ...

Embodiment 3

[0066] The thematic information in a thematic map in Eastern Europe is distributed in continuous strips, and the thematic information is required to be evenly distributed and the distance from the map's surroundings should not be too large.

[0067] Adopting a plan based on thematic information, including the following steps:

[0068] Step A: Determine the target geographic scope

[0069] Draw the initial rectangle with the continuous strip-shaped thematic information as the control factor, ensure that the thematic information is centered in the initial rectangle and the strip-like direction is parallel to the long side, determine the target geographical range, and measure the actual distance of the short side of the target corresponding to the initial rectangle to be 436km , and the distance on the long side of the target is 951km;

[0070] Step B: Determine the initial scale for each scenario

[0071] Select two target map frames, which are 81cm and 108cm respectively, and...

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Abstract

The invention discloses a thematic map sheet planning method. The thematic map sheet planning method comprises planning mainly based on a map sheet, planning mainly based on a proportional scale and planning mainly based on thematic information, wherein the planning mainly based on the map sheet comprises three steps of determining an initial scale, determining a mapping scale and determining a mapping geographical range. The planning based on the proportional scale comprises three steps of determining an initial map sheet, determining a mapping map sheet and determining a mapping geographicalrange. The planning mainly based on the thematic information comprises four steps of determining a target geographic range, determining an initial scale of each scheme, determining a mapping scale ofeach scheme and determining a mapping geographic range. The three planning methods are selected according to actual requirements, and are extremely high in universality, high in practicability, simple to operate and high in efficiency. The method can be applied to thematic drawing in different fields, and a good solution is provided for drawing planning in the earlier stage of drawing.

Description

technical field [0001] The invention relates to the technical field of map drawing, in particular to a method for planning a thematic map frame. Background technique [0002] Thematic maps are necessary basic data in engineering construction. At present, they are widely used in various industries with a new look (such as weather maps, navigation maps, etc.). [0003] Traditional thematic maps used for display, such as wall charts and insert maps, are not easy to quantify in the map planning method, and the resulting map sheets have different specifications, which brings many difficulties to map update and modification. Contents of the invention [0004] The object of the present invention is to provide a method for planning a thematic map, aiming at the defects that the map planning method in the prior art is not easy to quantify, and the resulting map sheets have different specifications. [0005] The technical scheme adopted for realizing the purpose of the present inve...

Claims

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Application Information

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IPC IPC(8): G06T11/20
CPCG06T11/206
Inventor 杜辉李特史中心李一鹏
Owner CHINA RAILWAY DESIGN GRP CO LTD
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