Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

SRG (sphere rhombus grid) subdivision code and geographic coordinate converting algorithm

A technique for subdividing codes and geographic coordinates, which is applied in the field of conversion algorithms and can solve problems such as insufficient conversion accuracy

Inactive Publication Date: 2012-07-11
NAT UNIV OF DEFENSE TECH
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Row-column approximation method" only applies simple arithmetic operations of addition, subtraction, multiplication and division in specific calculations, and the corresponding conversion speed is fast, but the conversion accuracy is not high enough

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • SRG (sphere rhombus grid) subdivision code and geographic coordinate converting algorithm
  • SRG (sphere rhombus grid) subdivision code and geographic coordinate converting algorithm
  • SRG (sphere rhombus grid) subdivision code and geographic coordinate converting algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0104] Examples of conversion between latitude and longitude coordinates and SRG subdivision address codes

[0105] Conversion of SRG codes to latitude and longitude coordinates

[0106] For example, the quadrilateral numbered 0012301 is generated by 6-level subdivision, and its latitude is recorded as w 0112301 , longitude recorded as j 0012301 , the calculation process is as follows:

[0107] w 0012301 =w 001230 -45 / 5 5

[0108] =w 00123 +45 / 24 -45 / 2 5

[0109] =w 0012 +45 / 2 4 -45 / 2 5

[0110] =w 001 +45 / 2 4 -45 / 2 5

[0111] =w 00 -45 / 2+45 / 2 4 -45 / 2 5

[0112] =45-45 / 2+45 / 2 4 -45 / 2 5

[0113] =24.25

[0114] j 001 =1×(90 / 3)+45 / 3

[0115] j 0012 =2×(90 / 6)+45 / 6

[0116] j 00123 =5×(90 / 12)+45 / 12

[0117] j 001230 =10×(90 / 23)+45 / 23

[0118] j 0012301 =21×(90 / 47)+45 / 47=41.17

[0119] Conversion of latitude and longitude coordinates to SRG code

[0120] Given the latitude and longitude coordinates (...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an SRG (sphere rhombus grid) subdivision code and geographic coordinate converting algorithm, which is based on the SRG subdivision method. The SRG subdivision code and geographic coordinate converting algorithm inherits the advantages of the SRG subdivision method, SRG address codes have constant directivity and are favorable for proximity searching, no projection conversion is involved in the SRG subdivision method and no projection is involved during conversion, simple arithmetic operations of addition, subtraction, multiplication and division are involved during computing, and computing speed is high. Besides, rhombus blocks hard to differentiate are differentiated by the aid of the coordinate system, and conversion accuracy is increased.

Description

technical field [0001] The invention relates to a conversion algorithm between subdivision coding and latitude and longitude coordinates based on the SRG subdivision method. Background technique [0002] At present, the vast majority of spherical geographic data is based on latitude and longitude coordinates. In the SRG structure, the grid coordinates are implicitly expressed by address codes. The data information in is mapped to the traditional latitude and longitude coordinates, in order to conform to people's thinking habits, the mutual conversion between these two address codes must be realized. [0003] Sphere Rhombus Grid (SRG) is a subdivision method based on geographic coordinates combined with latitude and longitude and using the idea of ​​regular polyhedron recursion step by step to directly subdivide the spherical surface. [0004] At present, the vast majority of spherical geographic data is based on latitude and longitude coordinates. In the SRG structure, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F17/30
Inventor 徐晖聂洪山孙兆林徐欣刁节涛张玉梅
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com