Everything has spatiotemporal attributes and is related to spatial information, and geographical information is everywhere.

GIS is based on spatial data, and aerospace, ground, surface, underground, etc. are all areas studied by GIS.

The various mapping tools and online map products we come into contact with in our work and life are just the tip of the GIS iceberg.

In fact, GIS has been widely used in land, meteorology, mining, agriculture, forestry, municipal administration and other professional fields since its initial development of maps to handle and analyze business problems faced by various industries and assist them in decision-making.

What exactly can GIS do?

Take mass applications as an example.

GIS is first used to collect geographical information. Most human activities are related to geographical location. For example, you want to find a restaurant to eat with friends, you want to find a cinema to watch a movie on the weekend, you go to a strange city on a business trip to find a hotel... these are all

Involves geographical information.

Since the development of GIS, it has closely followed the pace of IT-related technologies, from stand-alone desktop tools to Internet Web online applications to mobile portable applications; driven by various application needs, from simple mapping to two-dimensional GIS applications, from 2.5

Progress from 3D to 3D, and even a breakthrough in true three-dimensional space.

GIS has developed and transformed rapidly in just a few decades.

GIS applications have penetrated into all walks of life, gradually expanding the breadth and depth of applications horizontally and vertically, becoming the backbone of our creation of smart cities and smart earth.

17 common open source GIS platforms and software. Thanks to the development of the Internet, WebGIS is developing rapidly, and development tools and platforms are also blooming.

More people are beginning to pay attention to WebGIS applications. Many developers have joined the GISer army, which has spawned many open source GIS projects and promoted the popularity of WebGIS. Here we share 17 common open source GIS platforms and software. See how many of them you have used.

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1. uDiguDig is an open source desktop application framework (see picture), which is a desktop GIS built on Eclipse RCP and GeoTools (an open source Java GIS toolkit).

As an open source desktop GIS software, uDig is based on Java and Eclipse platforms and can edit and view shp format map files. It is an open source spatial data viewer and editor that supports OpenGIS standards, WebGIS, network map servers and network function servers.

There are special enhancements.

2. QGIS QGIS is a user-friendly desktop GIS that can run on Linux, UNIX, Mac OSX and Windows platforms.

QGIS is a user-friendly, cross-platform, open source desktop geographic information system developed using C++ language based on Qt (a cross-platform graphics tool package), as shown in the figure.

3. GeoServerGeoServer is a J2EE implementation of the OpenGIS Web server specification. GeoServer can be used to easily publish map data, allowing users to update, delete, and insert data. GeoServer can quickly and easily share geographic information among users.

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GeoServer is a community open source project, and relevant materials can be downloaded directly through the community website, as shown in the figure.

GeoServer supports a series of OGC standard services, databases such as PostgreSQL and MySQL, as well as middleware and file resources such as ArcSDE and ShapeFile. It can output network maps into various images and data formats such as JPEG, PNG, KML, etc., and can run on any

Based on J2EE/Servlet containers, it supports multiple client frameworks, such as Openlayers, etc.

4. MapServerMapServer is an open source WebGIS project developed by the University of Minnesota in the 1990s using C language.

MapServer is a real-time map publishing system based on the fat server/thin client model. When the client sends a data request, the server processes the spatial data in real time and sends the generated data to the client. The core part of MapServer is C language.

The map operation module is written, and many of its functions rely on some open source or free libraries.

MapServer follows the OGC series of specifications and can integrate PostGIS and the open source database PostgreSQL, and perform storage and SQL query operations on geospatial data. It also supports other client APIs to realize the transmission and expression of geospatial data.