遥感信息
遙感信息
요감신식
2015年
3期
14-18
,共5页
资源三号卫星%RPC 模型%DEM%区域网平差%精度
資源三號衛星%RPC 模型%DEM%區域網平差%精度
자원삼호위성%RPC 모형%DEM%구역망평차%정도
ZY-3 imagery%RPC model%DEM%block adjustment%accuracy
为提高国产遥感卫星影像定位精度，提取高精度 DEM，该文基于卫星遥感的成像模型和间接平差理论，利用有理函数模型和像面仿射变换模型，构建了卫星影像平差数学模型；利用该数学模型对资源三号卫星立体影像进行了平差处理，建立了研究区域 DEM。分析结果表明：DEM 在无控制点情况下，平地区域平面精度达到6．12m，高程精度达到8．39m；山地区域平面精度达到6．20m 的，高程精度达到8．62m，数据精度能够满足1∶50000比例尺地形图测图标准和要求。研究结果验证了国产卫星数据的定位精度。
為提高國產遙感衛星影像定位精度，提取高精度 DEM，該文基于衛星遙感的成像模型和間接平差理論，利用有理函數模型和像麵倣射變換模型，構建瞭衛星影像平差數學模型；利用該數學模型對資源三號衛星立體影像進行瞭平差處理，建立瞭研究區域 DEM。分析結果錶明：DEM 在無控製點情況下，平地區域平麵精度達到6．12m，高程精度達到8．39m；山地區域平麵精度達到6．20m 的，高程精度達到8．62m，數據精度能夠滿足1∶50000比例呎地形圖測圖標準和要求。研究結果驗證瞭國產衛星數據的定位精度。
위제고국산요감위성영상정위정도，제취고정도 DEM，해문기우위성요감적성상모형화간접평차이론，이용유리함수모형화상면방사변환모형，구건료위성영상평차수학모형；이용해수학모형대자원삼호위성입체영상진행료평차처리，건립료연구구역 DEM。분석결과표명：DEM 재무공제점정황하，평지구역평면정도체도6．12m，고정정도체도8．39m；산지구역평면정도체도6．20m 적，고정정도체도8．62m，수거정도능구만족1∶50000비례척지형도측도표준화요구。연구결과험증료국산위성수거적정위정도。
In order to improve the position accuracy of domestic remote sensing imagery and obtain an accurate DEM (digital elevation model),a mathematical adjustment model was constructed using the transformation in image plane and RPC model. Block adjustment on ZY-3 imagery was performed using the constructed model.Several GCPs (ground control points)were selected for computation and validation.The method with both of a few of GCPs and none GCPs were performed.As to the method with none GCPs,the plane precision is 6.12m and the height accuracy is 8.39m in flat land while 6.20m and 8.62m in mountain area according to the validation.Based on the result of adjustment,the DEM which covers the study area was interpolated.Compared to the SRTM DEM,the interpolated DEM keeps the same trend and a high degree of coincidence between them was proved.The result shows the potential of using this model to process the ZY-3 imagery for extracting the DEM.
