real gnss 보정 구현

Object - real gnss 보정 구현

함수정리

MVC 패턴 비스무리하지만 함수지향으로 - 기존코드로 완벽한 분리는 안댐

• 오른쪽같은 느낌으로

• 전부 모듈이다

proj4js - cdnjs.com - The best FOSS CDN for web related libraries to speed up your websites!

proj4js - Proj4js is a JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations. - cdnjs.com - The best FOSS CDN for web related libraries to speed up your websites!

https://cdnjs.com/libraries/proj4js/2.6.0

function correctionClick(e){
  //disable when no start or end exist
  if (!osm.startPvr || osm.endPvr)
    return
  
  console.log(e.coordinate)
  if (!osm.point1){
    osm.point1 = e.coordinate
    // todo - make line 1
  }
  else if (!osm.point2){
    osm.point2 = e.coordinate
    // todo - make line 2
    if (confirm("보정 진행할까요?") == false)
      return osm.point1 = osm.point2 = undefined
    correction()
    console.log('proj4', )
    osm.point1 = osm.point2 = undefined
  }
}

function translateEnd(e){
  /**
   * @summary - Event Function
   * @since - Called by All Click, Drag Event
   */

  // Return Shift Click
  if (e.mapBrowserEvent.originalEvent.shiftKey && osm.dragging === undefined)
    return
  let feature = e.features.getArray()[0]

  // Correction select reset and ClearSelect
  clearEndSelect()
  console.log('change selected', )

  // Return Vanilla Click Toggle
  osm.point1 = osm.point2 = undefined
  if (osm.dragging === undefined)
    return toggleRemove(feature)

  // Vanilla Drag
  dragged(feature)
}

function ChangeDegree(newLookAt){
  /**
   * @summary - Change big arrow degree
   */
  console.log(newLookAt)
  for (let pvr of PvrArray)
    if (pvr.PvrID == osm.startPvr)
      lookAt = pvr.Course
  lookAt = newLookAt + lookAt
  GetPvrRelationLocal()
}

function correction(){
  /**
   * @summary - Real Correction Function
   */
  proj4.defs([
    [
      'EPSG:4326',
      '+title=WGS 84 (long/lat) +proj=longlat +ellps=WGS84 +datum=WGS84 +units=degrees'
    ]
  ])
  let tan1 = Math.tan(osm.angle1)
  let tan2 = Math.tan(osm.angle2)
  let x1 = osm.point1[0]
  let x2 = osm.point2[0]
  let y1 = osm.point1[1]
  let y2 = osm.point2[1]
  let x = - ((y1-y2) - (tan1*x1 - tan2*x2)) / (tan1 - tan2)
  let y = tan1*(x - x1) + y1
  // if not in extent - alert

  // move pvr
  console.log(x, y)
  movePvr(osm.startPvr, osm.startFeature, [x, y])
  GetPvrRelationLocal()

  
}


function resetCorrection(soft){
  /**
   * @summary - reset Correction 
   * @since - correction complete or restart
   */
  // todo - remove layer
  console.log('reset soft', soft)
  if (soft)
    osm.point1 = osm.point2 = undefined
  else
    osm.selectCoor = osm.point1 = osm.point2 = undefined
}

• soft reset으로 성공

function correction(){
  /**
   * @summary - Real Correction Function
   */
   proj4.defs([
    [
      'EPSG:32652',
      '+proj=utm +zone=52 +ellps=WGS84 +datum=WGS84 +units=m +no_defs'
    ]
  ])
  let tan1 = Math.tan(osm.angle1)
  let tan2 = Math.tan(osm.angle2)
  
  let tm1 = proj4('EPSG:3857', 'EPSG:32652').forward(osm.point1)
  let tm2 = proj4('EPSG:3857', 'EPSG:32652').forward(osm.point2)
  let x1 = tm1[0]
  let x2 = tm2[0]
  let y1 = tm1[1]
  let y2 = tm2[1]
  let x = - ((y1-y2) - (tan1*x1 - tan2*x2)) / (tan1 - tan2)
  let y = tan1*(x - x1) + y1

  // move pvr
  let xy = proj4('EPSG:3857', 'EPSG:32652').inverse([x, y])
  newX = xy[0]
  newY = xy[1]

  // todo - if not in extent - alert
  let newlnglat = ol.proj.transform([newX, newY], 'EPSG:3857', 'EPSG:4326')
  newlng = newlnglat[0]
  newlat = newlnglat[1]

  movePvr(osm.startPvr, osm.startFeature, [newlng, newlat])
  GetPvrRelationLocal()
}

• 공식

한국 주요 좌표계 EPSG코드 및 proj4 인자 정리

본 좌표계에 관한 정보들은 타원체 변환을 위해 국토지리정보원이 2002년 12월에 고시(제2002-433호)한 "국가좌표변환계수"의 Bursa-Wolf 모델용 7개의 변수를 기준으로 작성되었습니다. 현재 국토지리정보원의 공..

https://www.osgeo.kr/17

• 사용법 PROJ4.JS

proj4js/proj4js

Proj4js is a JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations. Originally a port of PROJ.4 and GCTCP C it is a part of the MetaCRS group of projects. Depending on your preferences npm install proj4 bower install proj4 component install proj4js/proj4js or just manually grab the file proj4.js from the latest release's dist/ folder.

https://github.com/proj4js/proj4js#readme