南方CASS内、外业一体化成图作业方法的完善     

黄南  蔡晓桦  王有亮 《东北测绘》2012,(3):199-202

南方测绘仪器公司的CASS数字化地形地藉成图软件是基于AutoCAD平台技术的GIS前端数据处理系统,广泛应用于地形成图、地藉成图、工程测量应用、空间数据建库和市政监管等领域。本文把CASS中的“编码引导”与“简码识别”测量方法相结合,进一步完善了CASS外业作业程序,提高了内、外业作业的效率。  相似文献   

辽河保护区生态恢复遥感分析   总被引：1，自引：0，他引：1  

温日红  王笑影  吕国红  谢艳兵  姜鹏  李斯文  刘晓梅 《气象与环境学报》2013,29(6):110-115

利用2009年和2011年分辨率为10 m的法国SPOT卫星和日本ALOS卫星遥感资料,以ArcGIS9.3软件ArcMap模块为平台,采用人机交互目视解译对辽河保护区地类特征进行提取,对辽河保护区生态恢复状况进行监测分析。结果表明：2009年保护区土地利用类型以旱田、芦苇型湿地和水域为主,三种土地类型所占比例为72.9 %;2011年土地利用类型主要以水域、芦苇型湿地和草地为主,三种土地利用类型所占比例为62.9 %。 2011年保护区土地利用变化主要表现为旱田大幅度转出,转化为水域、草地和林地,与2009年相比,耕地显著减少,植被覆盖度增加了15.4 %。  相似文献   

Excel在形变观测数据处理中的应用     

陈志高  张志峰  陈晋  凌模  付辉清 《大地测量与地球动力学》2007,27(Z1):150-152

利用Excel的数据处理功能以及自带的"Visual Basic "语言进行二次开发,然后以宏的形式连接在Excel界面上,实现了形变观测数据的处理.  相似文献   

The impact of armed conflict and forced migration on urban expansion in Goma: Introduction to a simple method of satellite-imagery analysis as a complement to field research     

《Applied geography (Sevenoaks, England)》2017

The effects of armed conflict on cities constitute a large field of research in both conflict studies and urban studies. The topic of urban expansion is also explored by the domain of remote sensing, a sub-branch of geoinformation science. Remote sensing researchers analyze the spatial development of cities in conflict and non-conflict environments using satellite imagery.However, a dialogue or collaboration between these disciplines is virtually non-existent in the scientific discourse, mainly due to stark differences in their methodologies – namely, intensive on-the-ground field research in the case of conflict and urban studies and highly elaborate computer-based analysis of remotely-gathered data in the case of remote sensing.We aim to demonstrate a simple and thus feasible approach for the use of satellite imagery by non-experts of remote sensing, to add a spatio-temporal dimension to the results of in-depth field studies. We apply our approach to the city of Goma, in the eastern region of the Democratic Republic of the Congo, which is located at the center of protracted armed conflict that has raged for decades. With the support of local knowledge acquired during field visits, we visually analyze a time series of Landsat data and add our own results to those of existing research. Contextualizing the mapped results of Goma's urban expansion between 1986 and 2015, we show how urban growth is linked to particular waves of forced displacement caused by different stages of armed conflict and one particular natural disaster.  相似文献   

Cultural climatology and the representation of sky, atmosphere, weather and climate in selected art works of Constable, Monet and Eliasson     

John E. Thornes 《Geoforum》2008,39(2):570-580

The visual turn presents new challenges and methodologies for the pursuit of geography as we seek to communicate our ideas and understanding within and beyond the discipline. This paper attempts to show the potential importance of visual culture within a field that we may call cultural climatology. Cultural climatology seeks to explore the dialectic between society and atmosphere, weather and climate at a variety of temporal and spatial scales. A new visual approach to cultural climatology is presented as a possible way of stimulating conversations across the divide between the social and physical sciences. Images and visualisation assert their presence in the understanding, modelling and communication of many nature/culture debates, highlighting a need both for visual literacy across geography, and for social and physical scientists to share their visual methodologies. Cultural climatologists, like other scientists, need visual methodologies for both the critical construction and deconstruction of the images they wish to present and with which they are confronted. To illustrate the importance of visual literacy for cultural climatologists this paper introduces a sample of works from three artists: Constable, Monet and Eliasson. It shows how an exploration of their work (via a theory of pictures) could help to provide: firstly a methodology for understanding the cultural symbolism of skies and weather; secondly an assessment of the urban atmosphere in London at the turn of the 20th century and thirdly an example of the effective representation of atmosphere, weather and climate involving public participation and understanding. Lessons learned from deconstructing these works of art will then be used to suggest improvements in the visualisation of weather in the production and consumption of weather forecasts (thus, picturing theory).  相似文献   

海底天然气水合物资源量计算及环境效应评估   总被引：3，自引：0，他引：3  

葛倩  王家生  向华  甘华阳  胡高伟 《海洋地质与第四纪地质》2004,24(4):127-133

计算天然气水合物的资源量是比较复杂的 ,利用垂直大陆边缘横断面面积来计算水合物资源量的方法 ,能较好地反映外界条件变化所导致的水合物资源量在时间上的变化趋势。呈透镜状的水合物横断面面积主要与以下 6个参数有关 :水的活度、大陆坡深度、大陆架转折端的深度、大陆坡坡度、底部水温以及地热梯度。其中 ,前 3个参数中任何一个减小或者后 3个参数中任何一个增大都会导致横断面面积的减小。运用VisualBasic 6 0编程 ,以布莱克海岭地质背景为例 ,根据横断面面积、充填率和孔隙度计算全球海底水合物资源量约为 3 97× 10 5km3 ,与其他学者的计算结果相当。进而推算出LPTM约有 0 38× 10 5km3 的水合物被溶解并释放到海洋和大气圈中 ,导致当时沉积的碳酸盐岩和有机物的平均δ13 C下降 - 2 5‰的重大地质事件。这种水合物资源量计算方法 ,对分析地史时期类似重大转折时期评估天然气水合物对全球环境的影响 ,具有较强的启迪作用  相似文献   

可视化编程用于建立成像光谱仪海洋遥感资料处理系统     

毛志华  潘德炉 《海洋技术学报》1997,16(2):33-38

利用可视化编程语言ＶＢ开发出一套成像光谱仪资料处理系统，用于海面叶绿素浓度信息提取，具有操作方便的图形用户界面，大大简化了各种振兴中华，去了众多参数值的反复输入。图像处理模块可加入许多常用的图像处理功能。并可调入一些商业化软件，寿命完成许多图像处理功能。  相似文献   

视觉艺术抽象形式的心理解析     

张卫峰 《广东海洋大学学报》2005,25(2):118-120

艺术抽象,就其作为广义的理论范畴来说,是指与“艺术具象”相对应的,对自然对象的色彩、形状、空间、运动等进行概括、抽样、重组的艺术加工方式,它与人类某种基本的认知能力相联系。艺术抽象可以使艺术创作离开自然的表皮、深入到自然的本质之中,不是简单地复写自然,而是在内心熔铸感官印象、探索“宇宙性的规律”,在艺术与自然之间建立起一种更内在的联系。理解艺术抽象的结构与特征对于我们更充分、更深入地理解视觉艺术的本质与内涵不无裨益。  相似文献   

编辑文本数据实现Mapinfo的图形对象     

王云云  边庆凯  于春颂 《内陆地震》2007,21(1):71-77

简要介绍了Mapinfo工具条和9种图形类型, Mif文件的书写格式.结合3个实例,即1∶1 000 000地形图数据索引Visual Basic下的实现过程,潜在震源区的绘制方法,以及具有四角顶点地理坐标位图的几何校正,对在Mapinfo平台下文本数据的编辑方法进行了介绍.  相似文献   

用VB和Fortran语言混合编程开发气象软件          下载免费PDF全文

杜文娟  李建东 《气象与环境科学》2007,30(4):88-90

阐述了利用VB和Fortran语言混合编程开发气象预报系统的两种方法,一种是利用VB的shell函数调用可执行文件法,另一种是利用VB调用Fortran生成的动态链接库法,并具体介绍了如何通过DLL实现VB 6.0和Fortran的接口,最终实现VB的可视化界面与Fortran强大数值计算能力相结合的新思路.  相似文献