Pub Date : 2021-11-01DOI: 10.1061/(asce)su.1943-5428.0000377
R. Snay, J. Saleh, M. Dennis, C. Demets, H. Mora-Páez
AbstractThis paper introduces Version 0.3 of the TRANS4D software, where TRANS4D is short for Transformations in Four Dimensions. TRANS4D enables geospatial professionals and others to transform th...
摘要本文介绍了TRANS4D软件的0.3版本，TRANS4D是四维变换(Transformations in Four Dimensions)的简称。TRANS4D使地理空间专业人员和其他人能够将…
{"title":"Expanding TRANS4D’s Scope to Include 3D Crustal Velocity Estimates for a Neighborhood of the Caribbean Plate","authors":"R. Snay, J. Saleh, M. Dennis, C. Demets, H. Mora-Páez","doi":"10.1061/(asce)su.1943-5428.0000377","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000377","url":null,"abstract":"AbstractThis paper introduces Version 0.3 of the TRANS4D software, where TRANS4D is short for Transformations in Four Dimensions. TRANS4D enables geospatial professionals and others to transform th...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41487564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Voxel Change: Big Data–Based Change Detection for Aerial Urban LiDAR of Unequal Densities","authors":"Harith Aljumaily, D. Laefer, Dolores Cuadra, M. Velasco","doi":"10.1061/(asce)su.1943-5428.0000356","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000356","url":null,"abstract":"AbstractThe proposed voxel change (VC) algorithm provides accurate, scalable, and quantifiable change detection for urban aerial Light Detection and Ranging (LiDAR) scans. This VC algorithm uses Ma...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41511838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1061/(asce)su.1943-5428.0000374
H. Shih, T. Yeh, Yujun Du, Kaifei He
AbstractSea surface height (SSH), a measurement widely used in marine science, can be used to compute the marine gravity field while providing underlying information on the ocean current, tide, and...
{"title":"Accuracy Assessment of Sea Surface Height Measurement Obtained from Shipborne PPP Positioning","authors":"H. Shih, T. Yeh, Yujun Du, Kaifei He","doi":"10.1061/(asce)su.1943-5428.0000374","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000374","url":null,"abstract":"AbstractSea surface height (SSH), a measurement widely used in marine science, can be used to compute the marine gravity field while providing underlying information on the ocean current, tide, and...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42982095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-01DOI: 10.1061/(asce)su.1943-5428.0000313
Kan Wang, P. Teunissen, A. el-Mowafy
Ambiguity dilution of precision (ADOP) and position dilution of precision (PDOP) are two popular scalar-diagnostics used in Global Navigation Satellite System (GNSS) positioning. Where the ADOP is a predictor for carrier-phase ambiguity resolution performance, the PDOP is meant to predict the receiver-satellite geometry's capability for precise positioning. We will show, however, that although the PDOP works well for code-based positioning, one has to exercise great care in using the PDOP for real-time kinematic (RTK) positioning. We show that the ADOP and PDOP have distinct behaviors, an important consequence of which is that one can have time periods with small PDOPs, and thus seemingly good geometry for precise positioning, but at the same time large ADOPs, thus showing that successful ambiguity resolution and therefore precise positioning will not be possible. Also, the reverse situation may occur, i.e., having large PDOPs with small ADOPs. In such a situation, the large PDOPs should not automatically lead to the conclusion of poor position performance, because the large gain that ambiguity resolution brings will often still make precise positioning possible. We will analyze and explain this complementary behavior of the PDOP and ADOP and demonstrate this both analytically and empirically. For this analysis we use real Global Positioning System (GPS) single- and multifrequency signals and GPS/Quasi-Zenith Satellite System (QZSS), GPS/Navigation with Indian Constellation (NAVIC) L5 signals of two baselines located in Perth, Australia.
模糊精度稀释(ADOP)和位置精度稀释(PDOP)是全球导航卫星系统(GNSS)定位中常用的两种标量诊断方法。ADOP是载波相位模糊度分辨率的预测器，而PDOP则是用来预测接收机-卫星几何结构的精确定位能力。然而，我们将表明，尽管PDOP在基于代码的定位中工作得很好，但在使用PDOP进行实时运动学(RTK)定位时必须非常小心。我们表明，ADOP和PDOP具有不同的行为，其中一个重要的结果是，一个人可以有小PDOP的时间段，因此似乎是精确定位的良好几何形状，但同时，大adopp，从而表明成功的歧义解决，因此精确定位是不可能的。此外，也可能出现相反的情况，即大的pdp和小的ADOPs。在这种情况下，大的pdp不应该自动导致定位性能差的结论，因为歧义解决带来的大增益通常仍然可以实现精确定位。我们将分析和解释PDOP和ADOP的这种互补行为，并通过分析和经验证明这一点。在此分析中，我们使用了位于澳大利亚珀斯的两条基线的真实全球定位系统(GPS)单频和多频信号以及GPS/准天顶卫星系统(QZSS)， GPS/Navigation with Indian Constellation (NAVIC) L5信号。
{"title":"The ADOP and PDOP: Two Complementary Diagnostics for GNSS Positioning","authors":"Kan Wang, P. Teunissen, A. el-Mowafy","doi":"10.1061/(asce)su.1943-5428.0000313","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000313","url":null,"abstract":"Ambiguity dilution of precision (ADOP) and position dilution of precision (PDOP) are two popular scalar-diagnostics used in Global Navigation Satellite System (GNSS) positioning. Where the ADOP is a predictor for carrier-phase ambiguity resolution performance, the PDOP is meant to predict the receiver-satellite geometry's capability for precise positioning. We will show, however, that although the PDOP works well for code-based positioning, one has to exercise great care in using the PDOP for real-time kinematic (RTK) positioning. We show that the ADOP and PDOP have distinct behaviors, an important consequence of which is that one can have time periods with small PDOPs, and thus seemingly good geometry for precise positioning, but at the same time large ADOPs, thus showing that successful ambiguity resolution and therefore precise positioning will not be possible. Also, the reverse situation may occur, i.e., having large PDOPs with small ADOPs. In such a situation, the large PDOPs should not automatically lead to the conclusion of poor position performance, because the large gain that ambiguity resolution brings will often still make precise positioning possible. We will analyze and explain this complementary behavior of the PDOP and ADOP and demonstrate this both analytically and empirically. For this analysis we use real Global Positioning System (GPS) single- and multifrequency signals and GPS/Quasi-Zenith Satellite System (QZSS), GPS/Navigation with Indian Constellation (NAVIC) L5 signals of two baselines located in Perth, Australia.","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91002222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-01DOI: 10.1061/(asce)su.1943-5428.0000298
Adam R. Benjamin, Dennis R. O'Brien, G. Barnes, B. Wilkinson, W. Volkmann
AbstractThe number of unmanned aerial system (UAS) mapping applications that require high-accuracy data sets have grown significantly in recent years. Indirect georeferencing (IG) requires the esta...
摘要近年来，需要高精度数据集的无人机测绘应用数量显著增长。间接地理参考（IG）需要建立。。。
{"title":"Improving Data Acquisition Efficiency: Systematic Accuracy Evaluation of GNSS-Assisted Aerial Triangulation in UAS Operations","authors":"Adam R. Benjamin, Dennis R. O'Brien, G. Barnes, B. Wilkinson, W. Volkmann","doi":"10.1061/(asce)su.1943-5428.0000298","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000298","url":null,"abstract":"AbstractThe number of unmanned aerial system (UAS) mapping applications that require high-accuracy data sets have grown significantly in recent years. Indirect georeferencing (IG) requires the esta...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(asce)su.1943-5428.0000298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46404168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-01DOI: 10.1061/(asce)su.1943-5428.0000296
S. Nadi, D. Shojaei, Y. Ghiasi
AbstractOne of the main concerns during digital elevation model (DEM) evaluation is the number of ground control points (GCP). Accordingly, in this paper, a new method is proposed for calculating t...
{"title":"Accuracy Assessment of DEMs in Different Topographic Complexity Based on an Optimum Number of GCP Formulation and Error Propagation Analysis","authors":"S. Nadi, D. Shojaei, Y. Ghiasi","doi":"10.1061/(asce)su.1943-5428.0000296","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000296","url":null,"abstract":"AbstractOne of the main concerns during digital elevation model (DEM) evaluation is the number of ground control points (GCP). Accordingly, in this paper, a new method is proposed for calculating t...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(asce)su.1943-5428.0000296","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48223194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1061/(asce)su.1943-5428.0000295
C. M. Rollins, T. H. Meyer
AbstractLow-distortion projections (LDPs) produce mapping grids formulated so that distances obtained by inversing grid coordinates match as best as possible the equivalent horizontal distances obs...
{"title":"Four Methods for Low-Distortion Projections","authors":"C. M. Rollins, T. H. Meyer","doi":"10.1061/(asce)su.1943-5428.0000295","DOIUrl":"https://doi.org/10.1061/(asce)su.1943-5428.0000295","url":null,"abstract":"AbstractLow-distortion projections (LDPs) produce mapping grids formulated so that distances obtained by inversing grid coordinates match as best as possible the equivalent horizontal distances obs...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(asce)su.1943-5428.0000295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45691621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1061/(ASCE)SU.1943-5428.0000282
Leyang Wang, Guisen Wen, Yingwen Zhao
AbstractThis paper presents a method for solving the ill-posed problem of the partial error-in-variables (EIV) model and a precision estimation method based on a second-order derivative approximate...
{"title":"Virtual Observation Method and Precision Estimation for Ill-Posed Partial EIV Model","authors":"Leyang Wang, Guisen Wen, Yingwen Zhao","doi":"10.1061/(ASCE)SU.1943-5428.0000282","DOIUrl":"https://doi.org/10.1061/(ASCE)SU.1943-5428.0000282","url":null,"abstract":"AbstractThis paper presents a method for solving the ill-posed problem of the partial error-in-variables (EIV) model and a precision estimation method based on a second-order derivative approximate...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)SU.1943-5428.0000282","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46648570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1061/(ASCE)SU.1943-5428.0000290
A. Amiri-Simkooei
AbstractHard constraints can play an important role in obtaining a unique, stable, precise, and well-conditioned least-squares solution in many geomatics applications. This paper presents a unified...
{"title":"Unified Least-Squares Formulation of a Linear Model with Hard Constraints","authors":"A. Amiri-Simkooei","doi":"10.1061/(ASCE)SU.1943-5428.0000290","DOIUrl":"https://doi.org/10.1061/(ASCE)SU.1943-5428.0000290","url":null,"abstract":"AbstractHard constraints can play an important role in obtaining a unique, stable, precise, and well-conditioned least-squares solution in many geomatics applications. This paper presents a unified...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)SU.1943-5428.0000290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46184387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1061/(ASCE)SU.1943-5428.0000281
Yishuai Shi, Jinming Hao, Weiping Liu, Bo Jiao, Hui Zhang, Baofeng Song
AbstractIn recent years, real-time precise point positioning (RTPPP) using the BeiDou Navigation Satellite System (BDS) is facing new developments thanks to the dissemination of BDS real-time state...
{"title":"Performance Assessment of BDS Real-Time Precise Point Positioning Based on SSR Corrections","authors":"Yishuai Shi, Jinming Hao, Weiping Liu, Bo Jiao, Hui Zhang, Baofeng Song","doi":"10.1061/(ASCE)SU.1943-5428.0000281","DOIUrl":"https://doi.org/10.1061/(ASCE)SU.1943-5428.0000281","url":null,"abstract":"AbstractIn recent years, real-time precise point positioning (RTPPP) using the BeiDou Navigation Satellite System (BDS) is facing new developments thanks to the dissemination of BDS real-time state...","PeriodicalId":54366,"journal":{"name":"Journal of Surveying Engineering","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)SU.1943-5428.0000281","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58515762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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