ModelBuilder

摘要： This paper describes the process of designing models and tools for an automated way of creating 3D city model based on a raw point cloud.Also,making and forming 3D models of buildings.Models and tools for creating tools made in the model builder application within the ArcGIS Pro software.An unclassified point cloud obtained by the LiDAR system was used for the model input data.The point cloud,collected by the airborne laser scanning system(ALS),is classified into several classes:ground,high and low noise,and buildings.Based on the created DEMs,points classified as buildings and formed prints of buildings,realistic 3D city models were created.Created 3D models of cities can be used as a basis for monitoring the infrastructure of settlements and other analyzes that are important for further development and architecture of cities.

摘要： 作为描述土地变化转移总体结构与数量的基础性模型,转移矩阵已广泛应用于土地利用/覆被变化领域。现有文献大多直接给出所研究区域的LUCC转移矩阵计算结果,但很少讨论分析其具体计算方法与步骤。针对这一情况,文中在界定总结转移矩阵概念和性质的基础上,详细描述ArcGIS平台下基于土地利用/覆盖栅格分类数据人工手动计算转移矩阵的过程及工具,并采用ModelBuilder技术通过集成现有工具设计实现一个转移矩阵自动批量计算工具模型。最后,以南京市、郑州市、徐州市三地的土地利用分类数据为例,对常规人工方法和批量自动方法进行对比实验。实验结果表明,所集成设计的批量计算工具平均可缩短计算用时10倍以上,能够有效克服常规人工方法中出现的人机交互频繁、效率低、易出错的不足。

摘要： 河道平均坡降反映了高程沿河道走向的变化情况,常规的河道平均坡降计算通常是利用CAD地形图开展的,划分河段并量取河段长度,读取河段起终点高程,录入Excel中计算河道平均坡降,计算效率低,且易受人为因素影响。针对这一问题,以流域DEM(数字高程模型)为基础,在ArcGIS中应用ModelBuilder模型构建器构建了河道平均坡降一键计算程序,选取浙江省10条典型小流域河道作为计算实例,数据对比表明,由ModelBuilder模型构建器构建的河道平均坡降一键计算程序可实现多条河道平均坡降的快速计算,并可保证计算精度。

摘要： 采用矢量构TIN法生产DEM时,如何提取地形特征点以消除不合理平三角是需要解决的关键问题。以往基于ArcGIS ModelBuilder流程化工具已基本实现特征点的提取,但仍存在诸多方面的缺陷。本文有针对性地提出了一种特征点提取改进方法,并基于ArcGIS Python进行编程实现。实践证明本方法切实提高了特征点提取的自动化程度、准确度稳定性和灵活度。

摘要： 增量数据库建设是第三次全国国土调查统一时点工作至关重要环节。在ArcGIS平台中以Modelbuilder构建空间分析模型转化成ARP模块化脚本形成第三次全国国土调查统一时点变更工具,本文分析三调统一时点增量数据库建设技术难点以及解决方案,并以案例验证其准确可靠,皆在体现AP在实际工作解决间题的高效。

摘要： 1∶10000数字线划图(DLG)全要素更新生产中,单线水系矢量方向检查多依靠人工目视判断,存在时间成本高、工作效率低、遗漏检查等问题。本文在分析水系流向分布情形的基础上,提出了一种单线水系矢量方向合理性检查算法,并基于ArcGIS的ModelBuilder建模程序,实现了该算法,开发了可视化的检查工具,选取福建某区域,对算法进行了验证。结果表明,该算法检查结果正确,能够提高工作效率。

摘要： 土壤侵蚀分析是铁路生态环境影响评价的重要内容,可为水土流失综合防治提供科学依据。以济南至滨州高速铁路沿线为研究区,利用ArcGIS的ModelBuilder构建基于加权叠加算法的土壤侵蚀强度类型自动绘制模型,对该区域土壤侵蚀状况进行现状分析和影响评估。研究表明:铁路工程建设造成的水土流失主要为水力侵蚀,分布在全域范围内,占比96.93%,局部存在少量风力侵蚀,分布在黄河以北地区(地区1、地区2等),占比3.07%;沿线经过的地区6、地区7土壤侵蚀类型为水力侵蚀,侵蚀强度以中轻度为主;沿线经过的地区1、地区2、地区8和地区9土壤侵蚀类型为水力侵蚀,侵蚀强度以轻度为主;在黄河以北地区,即地区1和地区2存在部分轻度风蚀,地区2、地区8和黄河沿岸(地区6、地区7、地区8交界处)伴有少量的中度风蚀。

摘要： 土地勘测定界工作是集体土地征收过程中的重要环节,能为用地审批提供精准的土地范围、用地面积、现状地类等数据,在征地报批中具有关键作用。分析了集体土地征收中土地勘测定界的工艺流程和注意事项,并利用ArcGIS模型构建器(Model Builder)实现了征地地类自动化叠加分析,具有显著的数据处理优势,极大地提高了工作效率和成果质量,具有较强的实用性。

摘要： 在测绘生产中,对矢量数据进行拓扑关系检查是常见的质量检查内容。利用ArcGIS的Model Builder(模型构建器)创建拓扑模型可极大提高对矢量数据拓扑检查的效率。Model Builder平台以其快捷高效的数据处理能力极大程度地简化了在实际生产中重复且烦琐的操作步骤。本文的实验方法,以展示自动化拓扑检查和设计共享应用为出发点,为提高质检环节的效率提供可行的新思路新方法。

摘要： Climate change can impact coastal areas in different ways,including flooding,storm surges,and beach erosion.Of these,flooding has a major impact on the operation of coastal drainage systems.This paper develops a new flood screening model using a LiDAR based digital elevation model(DEM)to improve the implementation of Victorian’s coastal flooding risk assessment and management.Hydrological elevation models are directed towards protection from cloudbursts and applied to rising sea level.The aim is to simulate water flow on the ground and in streams,and the resulting accumulation of water in depressions of the blue spot using DEM.Due to the presence of pipes,watercourses,bridges and channels it was required that the DEM data to be lowered.The reservoirs of rain will prevent seawater from flowing across the stream channel into land.The rain drain will be open during normal sea levels to allow rain water in the river to move and flow in to the sea.Traditionally,geographic information system(GIS)assists with spatial data management,but lacks modelling capability for complex hydrology problems and cannot be relied upon by decision-makers in this sector.Functionality improvements are therefore required to improve the processing or analytical capabilities of GIS in hydrology.This research shows how the spatial data can be primarily processed by GIS adopting the spatial analysis routines associated with hydrology.The objective of this paper is to outline the importance of GIS technology for coastal flood management.Following a definition of the coastal flood,and,short description of its peculiarities and the urgency of its management,this paper describes the use of GIS technology in coastal flood management,its advantages and the consideration for accuracy.This is followed by the information and LiDAR data required for coastal flood management and the application area in coastal flood management.This paper method is presented to conduct a first high-resolution DEM screening to detect the degree and capacities of the sinks in the coastal landscape.When their capacities are established,the rain volumes received during a rainstorm from their coastal catchments are saved as attributes to the pour points.The conclusion emphases the importance of a geographical information system in coastal flood management for efficient data handling and analysis of geographically related data.Local governments at risk of coastal flooding that use the flood screening model can use to determine appropriate land use controls to manage long-term flood risk to human settlements.