房产测量中预测与实测面积差异的探讨

房产测量的面积测算中,由于房屋预测成果和实测成果的差异而引发的矛盾和纠纷时有发生。根据笔者所了解的情况,针对其中几个关键的主要问题,即房屋预测成果与实测成果的时效的定义、保温墙体的厚度的定义、共有公用部位的问题进行了比较详细的论证与分析、并针对这些问题,提出了一些解决办法与对措施的意见和建议。     

房产测量中面积预测与实测差异分析研究

房产测量的面积测算中,由于房屋预测成果和实测成果的差异而引发的矛盾和纠纷时有发生.根据笔者所了解的情况,针对其中几个关键的主要问题,即房屋预测成果与实测成果的时效的定义、保温墙体的厚度的定义、共有公用部位的问题进行了比较详细的论证与分析、并针对这些问题,提出了一些解决办法与对措施的意见和建议.     

RTK技术在城市一级控制测量中的应用

本文结合实例，通过对RTK测量成果与GPS静态观测成果和四等水准测量成果及反算方位角和边长与全站仪实测边角的比较，分析了RTK测量精度。     

高精度仪器解析测绘法

为准确地分析和评价农村土地调查成果的质量与精度,本文对实验区的农村土地调查成果进行实测验证,运用实测数据和数理统计有关理论,进行计算、比较分析,在没有先例的情况下,重点对图斑面积的精度进行探讨和分析,得出了一些很有价值的结论,为以后的研究打下了基础,供同仁们参考。     

高精度仪器解析测绘法

为准确地分析和评价农村土地调查成果的质量与精度,本文对实验区的农村土地调查成果进行实测验证,运用实测数据和数理统计有关理论,进行计算、比较分析,在没有先例的情况下,重点对图斑面积的精度进行探讨和分析,得出了一些很有价值的结论,为以后的研究打下了基础,供同仁们参考。     

实测验证农村土地调查成果质量浅析

实测验证测绘成果质量是农村土地调查的重要组成部分,是保障土地调查成果真实、准确的重要手段,也是做好土地调查工作不可缺少的重要环节。笔者根据长期从事该项工作的实际经验,针对农村土地调查的特殊性,归纳整理实测验证的具体方法,并重点进行了相关阐述。     

GPS高程测量稳定性与实测水准点布设

本文主要论述了GPS高程测量的主要误差米源,通过通辽实测数据对GPS高程测量成果的稳定性进行了分析并对实测水准点的布设方法作了详细的探讨。     

DGPS RTK技术在高等级公路放样测量中的应用

本文简要介绍了DGPS RTK的基本原理和放样作业流程。以实际高等级公路的放样测量为例，介绍了利用该技术进行工程实测的过程。通过对实测数据成果的分析，得出一些有益的结论。     

基于已有空三成果的二次加密方法

基于已有地理信息数据如何进行数据库快速更新是测绘地理信息工作者面临的挑战。以已有空三加密成果作为控制基础,采用PixelGrid系统,基于已有空三成果自动匹配快速获取控制点,完成对新影像二次加密的试验,提出在完全无外业实测控制的条件下快速实现对新获取影像加密的方法,并分别利用前期已有的加密点和外业实测控制点对区域网的精度进行检测,以验证该方法的可靠性。     

矿区地表移动观测成果处理的自动化实现

为提高矿区观测成果整理效率,本文结合矿区实测数据,介绍了使用VC进行编程实现矿区地表移动观测成果内业整理计算,绘制移动变形曲线,实现了矿区地表移动变形成果的自动化处理,从而直观描绘出地下开采造成的地表移动变形的状况。     

Practical Research of IKONOS-2 Geopositioning and Its Accuracy in Tibet of China

This paper presents the studies of the refining of IKONOS-2 RPC, the transform of the datum, the mode of the control point distribution and the method of IKONOS stereo triangulation, so that IKONOS imagery can be used to collect the precise geospatial data and produce the large scale map. The transform between the IKONOS-2 image space and the national coordinate system based on the RPC have been developed, and the results of block adjustment with various control schemes in a practical project near Himalayas have been examined and analysed. The encouraging results of high positioning accuracy have been obtained.     

Practical research of IKONOS-2 geopositioning and its accuracy in tibet of China

This paper presents the studies of the refining of IKONOS-2 RPC, the transform of the datum, the mode of the control point distribution and the method of IKONOS stereo triangulation, so that IKONOS imagery can be used to collect the precise geospatial data and produce the large scale map. The transform between the IKONOS-2 image space and the national coordinate system based on the RPC have been developed, and the results of block adjustment with various control schemes in a practical project near Himalayas have been examined and analysed. The encouraging results of high positioning accuracy have been obtained.     

Water Balance Study for a Basin Integrating Remote Sensing Data and GIS

Water balance of a basin involves estimation of input precipitation, runoff, infiltration and evapotranspiration (ET). Although ET may have large variations over a big basin, it is commonly estimated using a few point measurements and this makes the estimation error prone. Satellite based remote sensing data provides few parameters for estimation of energy fluxes, at the land surface and atmosphere interaction in a distributed manner using the meteorological parameters. These parameters through surface energy balance equation have been used for the estimation of ET in this study. Various spatially distributed variables required for ET estimation; viz. NDVI, surface albedo, surface temperature etc. have been derived using remote sensing and ancillary data for Tapi basin located in western India. Beside this field data such as rainfall, air temperature, relative humidity, sunshine hours etc. have been used. For computation of runoff, Soil Conservation Services (SCS) approach has been considered. Tapi basin up to Ukai dam has been selected as the study area. Satellite data from National Oceanic and Atmospheric Administration (NOAA), Polar Orbiting Environmental Satellite, which carries the Advanced Very High Resolution Radiometer (AVHRR), have been used for preparation of various maps required for runoff and ET analysis. The results of runoff and ET have been compared with observed data for 2 years, 2002–2003 and the results have been found in good agreement with observed data.     

基于人工神经元网络技术的土地利用/覆盖变化探测

针对现有的一些土地利用／覆盖变化探测方法存在的某些不足,提出了利用人工神经元网络（antificial neural network,ANN)进行土地利用／覆盖变化探测的方法,并对ANN网络的输出输出,网络结构和不同的网络模型进行了深入研究,充分利用已有的基础地理信息和高分辨率遥感影像辅助选取了ANN训练样本,试验结果表明,利用ANN总体上可提高土地利用／覆盖变化探测效率。     

航片数字化影像与SPOT5多光谱影像融合比较分析

通过利用多种图像融合方法分别对航片数字化影像与SPOT5多光谱影像进行融合试验,经定量化指标评价结果表明,利用Pansharp,HPF和HIS融合方法计算后得出的影像在很大程度上保留了原多光谱影像的光谱特征,清晰度有较大提高,具有更强的解译和量测能力。     

Environmental aspects in Dalli-Rajhara iron ore mine area,M.P. using digital image processing techniques

Landsat MSS (1982) and IRS LISS-II (1989) data have been used to study the land use/land cover changes in Dalli-Rajhara iron ore mine area. Supervised classification has been performed on the temporal data to generate land use/land cover maps. Land use/land cover categories generated from IRS LISS-II data of 36 m resolution has been resampled to 80 m and areal statistics have been computed for 2, 4, 8 and 10 km wide strips around Dalli-Rajhara iron ore mine. The environmental impact due to on-going mining activities in the area has been analysed. The results of this study indicate that due to increase in mine-related and agricultural activities, forests have been degraded and also forest areas have been reduced considerably.     

基于影像的明长城资源田野调查技术

明长城资源调查采用了基于影像的田野调查技术。该技术主要包括两部分,一是通过影像进行田野调查任务分配、路线规划、属性和定位信息的标示;二是通过田野调查数据采集系统数字著化录了田野调查成果。历时3年的明长城资源田野调查工作证实,该技术科学、高效、可操作性强。     

大地水准面差距计算方法的研究

本文首先证明了三种大地水准面差距计算方法(迈塞尔方法、文策尔方法、最小二乘配置法)之间的关系。通过对某盆地的大地水准面差距的计算及和多普勒结果的比较,得到了一些对计算我国大地水准面差距有益的结论。     

精确高程异常的确定

本文在顾及局部地形改正、椭球改正及大气改正的情况下,采用实测数据,应用Meissel方法和Wenzel频谱分析方法,对某盆地边缘的高程异常进行了实际计算。并将计算结果同多普勒高程异常进行了比较,证明结果是良好的。此外还对我国精确高程异常的确定提出了一些建议。     

Subsidence mapping at regional scale using persistent scatters interferometry (PSI): The case of Tuscany region (Italy)

In this paper the mapping of subsidences in Tuscany (Italy) is presented. To achieve our goal satellite SAR data processed with persistent scatters interferometry (PSI) technique have been used. Several subsiding areas have been identified and three of them have been analyzed in detail and subsequently compared with literature work both to validate the results and to analyze the evolution of the identified subsidences. In general, this comparison confirmed the quality of the analyses and, furthermore, lead to the identification of an important ground uplift close to Prato city, an area that was historically affected by subsidence.