Geographic location system based on openstreetmap+postgis paper documents + reference papers + project source code and database files

Objective record
Preface 1
Chapter one The introduction 2
1.1 Research background and significance 2
1.2 GIS Overview 2
1.3 The main work and breakthrough point of this paper 2
1.4 The organizational structure of this paper 3
Chapter two Overview of geographic location information 4
2.1 Geographic location data 4
2.2 OSM data structure 6
2.3 POSTGRESQL Geographic database 7
2.4 POSTGIS Spatial index in 8
2.5 Shortest path algorithm 9
The third chapter Demand analysis 11
3.1 System background 11
3.2 System objectives 11
3.2 Requirement Realization Analysis 11
Chapter four The system design 13
4.1 Development environment preparation 13
4.2 System flow chart 13
4.3 Introduction to auxiliary software 17
The fifth chapter system implementation 19
5.1 Implementation details and steps 19
5.2 test result 29
Chapter six summary 32
6.1 This paper summarizes 32
6.2 Future outlook 32
reference 34
Cause thank 36
pick want
In recent years , With the rapid development of cloud computing and mobile Internet technology . New user scenarios and requirements for travel convenience make the public increasingly dependent on map or navigation applications . Map software , Navigation software ,LBS social contact , Take a taxi 、 Carpooling and other applications provide people with great convenience , And is changing people's lives .
Spontaneous geographic information （Volunteered Geographic Information, abbreviation VGI） It means that every user can cooperate and help each other online , With GPS Handheld devices 、 Open access to high-resolution remote sensing images and geographical knowledge based on personal spatial cognition , establish 、 edit 、 management 、 Maintained geographic information . among OpenStreetMap（OSM） yes VGI One of the most famous sources of . This paper uses OpenStreetMap The shared geographic location data provided can easily build a reliable geographic location information system , It also supports the road network route query function provided by similar navigation software . Under the monopolistic market situation of large-scale third-party map service providers , To some extent, it provides convenient and flexible functional services to users with such needs .
key word ： Geographic location system ;OpenStreetMap;PostGIS; Shortest path algorithm
Preface
20 Since the 20th century , The demand for topographic maps and various thematic maps is increasing rapidly . Stereoscopic aerial photogrammetry And the development of remote sensing imaging technology , So that the photogrammetric workers can , Quickly carry out large-area measurement chart , At the same time, it is also for earth resource scientists , Like geologists 、 Pedologist 、 Ecologists, etc. provide extremely superior Conditions for resource exploration and medium level of detail mapping , The resulting thematic map has been a resource survey and management The most useful source of information .
Path planning is also a hot topic under the background of the popularity of mobile Internet in recent years . On common maps , Navigation , Natural disaster prediction , The development of unmanned machines and many other commercial fields play an important role . For example, the very popular car sharing business under the sharing economy . How to correctly and efficiently match the most convenient users with the same car after obtaining the complicated car demand . The technical points include ： Software architecture and data communication technology , Automatic navigation technology , Intelligent planning and decision-making technology . among , Path planning is an important field of this kind of research , It belongs to infrastructure . Another example is the unmanned express service launched by jd.com, a large e-commerce platform, in recent years , It also needs the express robot in the environment of static and dynamic obstacles , Efficiently find the path from the beginning to the given end , To meet specific evaluation criteria , The whole process can safely and reliably avoid all obstacles . This paper also discusses the monopoly of the major third-party map service providers , Is it possible to develop independently at a relatively small cost GIS System . The answer is yes . rely on OpenStreetMap Provided by open source OSM Geographic location data , And combine PostgreSQL Supported by the GIS Plug in features . Anyone can easily do what they want to do GIS System . Such as address query 、 Route planning , And the derived carpool trip matching , Both provide a possibility for small team or individual development .
Reprinted from ：http://www.biyezuopin.vip/onews.asp?id=16347