计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
23期
261-266,270
,共7页
赵方%张洁%赵天忠%闫民
趙方%張潔%趙天忠%閆民
조방%장길%조천충%염민
全球定位系统(GPS)精确度%漂移点剔除%多目标优化%面积测量
全毬定位繫統(GPS)精確度%漂移點剔除%多目標優化%麵積測量
전구정위계통(GPS)정학도%표이점척제%다목표우화%면적측량
Global Positioning System(GPS)accuracy%drift points eliminating%multi-objective optimization%area measurement
为提高林业生产调查中林地面积测量的精度和工作效率,针对目前手持GPS进行林地面积测量数据点处理和通过坐标转换计算面积容易引入误差的不足,提出一种基于Android平台的GPS林地面积测量方法。该方法一方面基于多目标优化原理构造评价函数并定义两条筛选原则,在保证采样点精度和曲率的情况下尽量减少点数量;另一方面在实现向量法时,根据方位角和球面距离计算面积,避免经纬度坐标转换引起的误差。实际测量结果表明,该方法能完全满足林地面积测量要求,且精度高于常规坐标转换法。
為提高林業生產調查中林地麵積測量的精度和工作效率,針對目前手持GPS進行林地麵積測量數據點處理和通過坐標轉換計算麵積容易引入誤差的不足,提齣一種基于Android平檯的GPS林地麵積測量方法。該方法一方麵基于多目標優化原理構造評價函數併定義兩條篩選原則,在保證採樣點精度和麯率的情況下儘量減少點數量;另一方麵在實現嚮量法時,根據方位角和毬麵距離計算麵積,避免經緯度坐標轉換引起的誤差。實際測量結果錶明,該方法能完全滿足林地麵積測量要求,且精度高于常規坐標轉換法。
위제고임업생산조사중임지면적측량적정도화공작효솔,침대목전수지GPS진행임지면적측량수거점처리화통과좌표전환계산면적용역인입오차적불족,제출일충기우Android평태적GPS임지면적측량방법。해방법일방면기우다목표우화원리구조평개함수병정의량조사선원칙,재보증채양점정도화곡솔적정황하진량감소점수량;령일방면재실현향량법시,근거방위각화구면거리계산면적,피면경위도좌표전환인기적오차。실제측량결과표명,해방법능완전만족임지면적측량요구,차정도고우상규좌표전환법。
In order to improve forest land area measurement of forestry production survey precision and work efficiency, handheld GPS in forest land area measurement exists some problems such as data point selection method and vector method, it proposes GPS forest area measure method based on Android. It constructs the evaluation function and defines two selec-tion principles, based on multi-objective optimization principle, it reduces the number of points while ensuring accuracy of GPS points. It uses the azimuth angle and the area of the spherical distance to calculate area avoiding the error which caused by latitude and longitude coordinates transformation when it realizes vector method calculating the polygon area. Measure results show that the method can satisfy the requirement of forest land area measurement, and accuracy is higher than common method.