基于ArcPy与定制ArcToolbox的矿山新增图斑自动编号及方法改进

针对当前矿山遥感监测成果数据编制过程中出现的新增矿山图斑手动编号耗时长、易出错以及规范不明确的问题,基于成果数据提交技术要求的分析结果,实现全流程、自动化地对新增矿山图斑进行编号并将该过程进行可视化。该流程通过ArcPy站点包实现矢量数据分割、排序、编号以及写入等一系列操作过程;并利用ArcToolbox的定制功能,对该一体化全流程进行封装与可视化,提高其交互性与有效性;并针对ArcPy内部原有的空间排序方式的不完善之处,提出并实现了矿山图斑排序方法的改进。通过对不同县市几十至近千个图斑进行编号验证,自动编号的速度能够达到每秒数十个,且编号效率随着图斑数量的增加而提高。实验结果表明该全流程自动化功能可以为矿山遥感监测成果数据编制工作提供有效支撑,显著降低编号过程的工作量,提高工作效率,并对其他大量、重复性的遥感监测图斑编号具有适用性。     

基于空间聚集的离散型图斑自动编号方法

针对离散型图斑在利用坐标位置进行自动编号时易出现混乱无序的弊端,利用Python语言和ArcPy站点包进行程序开发,提出了基于空间聚集原理的自动和手动分组编号方法,并详细阐述了程序实现过程中的重要技术细节。以武汉市长江新城内房屋面积测算工程为例,进行了程序测试,为复杂情况下的离散型图斑自动编号提供了行之有效的解决方案。     

图斑编号方法探索及其实现

鉴于目前图斑编号算法研究薄弱,提出了3种编号方法:简化MBR编号法、改进锥形编号法以及递归分解编号法;详细阐述了这3种方法的原理与编号步骤,并对它们的优缺点进行了比较分析。利用ArcGIS的VBA编程,实现了简化MBR编号法,并通过实验数据进行了测试,结果表明,该方法的编号效果相比目前普遍使用的方法,有较大的改善。     

利用FME实现数据自动规则编号功能

主要阐述全国第二次土地调查基本农田数据的建库编号功能的实现过程,该功能主要是利用FME软件,通过对各函数功能的组织来实现对基本农田保护图斑编号的自动规则编号,最终形成国家要求的标准数据。     

基于FME的土地利用现状图缩编技术研究

图斑缩编是地图制图综合中的重要部分,图斑会随着比例尺的改变而发生变化,包括降维和消除等.本文依据缩编规范,总结图斑缩编中需要遵循的原则和算法,并基于FME平台,构建出不同的图斑缩编器,包括图斑合并、图斑转点、图斑转线、图斑夸大、图斑边界简化等,最后将图斑缩编器结合到一起,完成整幅图的全自动缩编工作.实验结果表明,水域及水利设施用地、交通运输用地和林地面积变化情况比较大,整体图斑缩编效果较好.说明基于FME平台能快速、有效、全自动地完成图斑缩编工作,可为今后三调图斑缩编工作提供参考.     

基于南方cass的土地利用图斑绘制改进方法研究

第二次全国土地调查中土地利用图斑绘制是十分重要的环节.依据城镇土地利用数据建库的新绘制要求,研究在南方cass下传统的基于面的图斑绘制方法的不足,并提出一种改进的基于线的图斑绘制方法.采用该方法,很快完成了某县城镇17 kmz的土地利用图斑绘制工作.实践证明该方法可以大大提高土地利用图斑绘制的工作效率,确保土地利用数据...     

ArcGIS for Android在土地调查中的系统设计与应用

土地调查工作的重点是外业数据采集,野外调查工作的要点是实地定位调查图斑,现场勾画图斑,测量图斑面积、距离,采集图斑的属性、实地照片等工作。本文应用ArcGIS for Android SDK开发包,结合外业调查实践,利用手机的GPS功能,实现了对监测图斑的定位导航、数据采集等应用,保证了数据的准确性。     

地球椭球面图斑面积计算方法探讨

针对地球椭球面图斑连线类型的非唯一性、椭球面梯形面积计算公式的多样性以及任意图斑面积计算精度控制的复杂性等问题,该文基于理论探讨与实例计算相结合的方法,明确了土地面积量算中适宜采用的椭球面图斑类型,测定了各椭球面梯形面积公式的计算精度,给出了任意图斑面积计算精度控制的新思路。研究表明:采用等角航线作为地球椭球面两界址点之间连线的等角航线图斑更适宜于土地面积量算工作;取至e~(10)项的乘积项椭球面梯形面积公式不仅精度高于其他两个理论上等价的近似公式,而且也高于精确计算公式;把割、补三角形看做特殊的椭球面大梯形,借助递归算法,提出了椭球面大梯形面积计算的新公式,这为椭球面上任意图斑面积计算及精度控制提供了新思路。     

一种改进的图斑合并算法

从计算几何的角度提出了一种改进的图斑合并(聚合和融合)方法。图斑聚合采用缓冲区合并的思想,可以有效地合并"桥梁"区域,并保持图斑的自然弯曲形态;图斑融合通过骨架线剖分小图斑,以共享边和地类为共同作用因子,将小图斑逐个合并到原始图斑的拓扑相邻图斑中。此算法有效地维持了图斑边界的自然弯曲,并顾及了图上显示地类的父类整体变化情况。     

土地变更调查监测图斑核查管理信息系统设计

针对年度土地变更调查遥感监测图斑外业核查后获取的信息进行数据管理的工作流程,设计了基于GIS技术的管理信息系统构架,实现核查图斑内各地类面积查询和统计,确定遥感监测图斑的变更范围、建设用地违法占用耕地比例统计等功能,并自动输出报表,可提高图斑核查信息内业处理工作的效率和准确性。     

Educating Geographers with GIS Skills for the Real World: Some Feedback from Geography Graduates at Southwest Texas State University

Abstract

Results of a survey to find out whether the GIS program in the Department of Geography at Southwest Texas Stare University (SWT) has served its graduates well are presented. In recent years, a considerable amount of effort has been given to the development of strategies for expanding the existing horizon of GIS education, integrating existing programs, and improving the ways in which GIS education is delivered. This study takes a different approach and seeks to get input from geography graduates who have secured a job in the real world for improving a university GIS program. Based on 26 responses to the survey, employment categories of SWT geography graduates are examined first. Then, geography courses that are considered most helpful in career development by the survey participants are identified. Third, useful GIS courses and essential skills required by the marketplace in the real world as suggested by the survey participants are discussed. It is clear from the results of the survey that the geography program at SWT in general has served its graduates well. Results from the survey also clearly indicate that GIS skills are useful in the career development of most geography graduates, particularly for those who have a concentration area in either GIS/Cartography, Resource and Environmental Studies, or Urban and Regional Planning.     

土地利用景观格局对居民就业可达性的影响——以武汉市中心城区为例

城市的制度转型和空间重构加剧了职住分离现象,降低了居民就业可达性,土地利用景观格局特征是影响居民就业可达性的因素之一。基于经济普查、人口普查数据以及2010年和2014年两期土地利用数据,对武汉市中心城区街道尺度的居民就业可达性进行分析,定量描述土地利用景观格局对居民就业可达性的影响。研究结果表明,景观格局指数中景观尺度的边缘密度、香农多样性指数和斑块类型尺度的斑块面积、斑块占景观面积比例、回旋半径、聚合度均对就业可达性有显著影响;就业类斑块特征对居民就业可达性的影响比居住类斑块更大,居住区规划应考虑周边就业岗位数量;土地利用多样性、斑块分布紧实度的提升均有助于提高居民就业可达性。     

GPS控制网环检验程序的设计

在GPS控制测量中,环检验是个不可或缺的步骤,其目的在于及时发现粗差,控制整网的精度。本文通过设计一个环检验程序,从算法角度讨论了手工检验和自动检验的具体实现,并详细介绍了针对复杂网形控制网构环算法的优化,保证了程序的可靠性和稳健性。     

利用VB通信控件实现GRE4与计算机间数据通信

介绍了利用 ＶＢ５． ０中的 ＭＳＣｃｏｍｍ通信控件编程,实现ＧＲＥ４电子手簿与计算机间的数据通信。该程序以 Ｗｉｎ９８为平台,采用图形用户界面,使用简单,操作方便,对子发挥ＧＲＥ４在数字化测图方面的作用有一定的现实意义。     

INSAR技术在海州露天矿边坡变形监测中的应用研究

露天矿边坡的变形监测一直是矿山安全生产的重要工作,运用合成孔径雷达干涉(INSAR)测量技术对边坡进行监测是近年来微波遥感研究的一个重要方向。本文分析了INSAR技术在边坡变形监测中的技术优势及研究的进展情况,并利用海州露天矿传统监测实测数据和INSAR监测进行比较,结果表明,INSAR技术可以实现对大型露天矿边坡有效地监测,具有一定的技术优势和广阔的应用前景。     

Earth observations during space shuttle flight sts 50: Columbia's mission to planet earth,June 25‐July 9,1992

Abstract

Many universities around the world are actively pursuing or have recently implemented professional graduate programs in geographic information science. However, the number of undergraduate programs focusing on geographic information science is far more limited. This is despite the rapid hiring of GIS faculty and the implementation of undergraduate program “specializations.” At first glance, this fact is surprising given the far greater number of undergraduate institutions. Unfortunately, undergraduate curriculum expansion is significantly more difficult than most graduate level, Master of Science/Arts programs. In particular, university administrators have been quite happy to approve professional Master of Science degree programs, seeing them for the financial stars they often are. Michigan State University created a similar, and now successful, MS‐GISc graduate program in 2000. Beginning in spring of 2003, the department of Geography began pursuing the development of a Bachelor of Science degree in Geographic Information Science. Expanding a traditional curriculum to include a BS‐GISc degree places an entirely different set of programmatic demands on both the department and faculty than the theoretically similar MS program. This paper outlines the challenges of establishing an undergraduate program in GISc, details the solutions employed, and provides recommendations for minimizing or mitigating the associated problems.     

利用IKONOS立体影像绘制1∶50000地形图的实践

本文介绍利用IKONOS的核线投影产品在国产的三种数字摄影测量工作站(DPW)上,按大规模生产的要求,对西藏樟木测区进行1:50000测绘的实践。提出“内业→外业→内业”的作业流程。分析了投影差对DOM的精度影响和DEM与DOM、DLG与DOM数据叠加产生影像位移的问题。     

MAPIT: A Computer Program for Production of Flow Maps,Dot Maps and Graduated Symbol Maps

Abstract

This paper describes some results of an attempt to design and to write a general purpose computer program which can be used to produce quality maps of discrete data by the person who has had no training in computer programming. In the first section, the variety of the maps this program can produce is illustrated; in the second section, some of the principles involved in such map production are discussed; in the third section, the input arrangements for using the program are described and, finally, the role of such programs in teaching and research in the years ahead is discussed.     

An Algorithm For Computer-Generated Equidistance Lines

The equidistance method of delimiting maritime boundaries is widely used in varied forms (simplified, modified, or true) to produce an equitable result for the settlement of areas of sovereign jurisdiction in the water column of adjacent coastal states. Equidistance lines have always been constructed manually, needing hours of tedious drafting. The manual procedure is not only repetitive in nature and slow, but the accuracy of the resultant line cannot be assured. This paper discusses an algorithm developed for the automation of the construction of equidistance lines. Some characteristics of the program are highlighted in the discussion and working cases provided to demonstrate program capabilities and cost effectiveness.     

用Excel VBA编制变形监测数据处理程序

Excel是大家很熟悉的办公软件,我们在工作中经常会用到.Excel本身提供了强大的二次开发功能:VBA具有强大的编程功能.主要介绍了如何利用Excel VBA建立一个完整的变形监测系统,实现监测工作的简捷、快速、准确、自动化.