October 26, 2018 28th, the third National Geographic Information Science Doctoral Academic Forum was held at the XianLin campus of Nanjing Normal University.Professor Yuan, Linwang attended the opening ceremony and made a thematic report entitled “GIS Innovative thinking: Thinking from a mathematical perspective” at the meeting.
October 10, 2018 Professor Yuan and the College delegation visited the University of Maryland, where he met with teachers and students involved in the Mpsgis project, discussed the current status of the project, discussed feedback from teachers and students, and exchanged views on future educational and research cooperation between NNU and UMD. In the second half of the meeting, Professor Yuan gave a seminar entitled “The Future of GIS” for the participating teachers and students, focusing on the exploration and research work made by the Geometric Algebra Project group in the future GIS direction. 
September 18, 2018-19th associate Professor Yu was invited to Beijing for the 16th session of the ESRI China User Conference in 2018, at which a report entitled “Innovative GIS” was made.The report analyzes the direction of the development of innovative GIS from the perspective of subject development, time demand and national strategic needs, and reports to the participating experts on the relevant work of the project team in GIS research based on geometric algebra.The participating experts made a high evaluation of the work of the project team and discussed the related technical issues in depth. 
August 2018 29-30th, associate Professor Yu Zhaoyuan participated in the 2018 China Geography conference hosted by the China Geographical Society, Shaanxi Normal University and the Institute of Geography Science and tourism.And in the Chapter field: “Geographic information science-the creative perspective of the young people’s geography” made a report entitled “From static depiction to dynamic construction: The holographic image and feature diagnosis of geographic information”. 
August 2018 29-30th, hosted by the Chinese Geographic Society, the 2018 China Geographical Congress hosted by the College of Geography Science and Tourism of Shaanxi Normal University held in Xian, as an important part of this Conference, The annual National Geographic Graduate Academic conference was held in Shaanxi Normal University (Yanta campus) in August 27-28th.The conference takes the theme of "The development of Chinese geography in the new Era" and summarizes and exchanges the latest research results in recent years on the topic of geography theory, method and technology application. Professor Lin Wang was invited to attend the National Geographic Postgraduate Academic Annual conference and to make a keynote report on the topic: "Mathematical Thinking and Geography research". 
Copyright: by Timoalho (https://github.com/ga/Resources) A curated list of geometric algebra Resources, inspired by awesome Lis Ts.
The goal is to eventually use a peer curation process for maintaining this repo once a sufficient number of people are par Ticipating in the organization. Until then, the just submit requests or open an issue.
Note: Please open this calculator with cell phone, computer access please press F12 to open the debug mode, and then switch to the mobile phone UI simulation display, the switch method is shown below the description address: Http://www.gagis.cn/gares/gacalc (recommended first to read the instructions) Copyright note: The project’s author is Enkimute, project source code see: Https://github.com/enkimute/ganja.js Function Description:
1) main interface
2) switch to the Phone UI mode (in the case of Chrome core browser) F12 Open Development mode, You can see a phone/tablet icon in the upper left corner of the development panel, click on the logo to simulate the UI mode, and select the device model and resolution at the top of the page.
3) Space selection (cue area) Input Panel of the first row of buttons, after selection, you can display space Metrix information in the Space display box, while the Input Panel highlights the available space base vectors and operators, the gray unavailable vector is not clickable.
4) expression input Input Panel below is an expression input box, where the lower left corner is a numeric entry, the middle is a symbol and the basic operator, the lower right corner for the pending parameter input (for equation solving)
5) Results display expression input completed, press “=”, the results display window will display results
6) prompt In the cue area can also display the history of the calculation process, clear the input button in the lower left corner, there is a less clear function of the button can first press the upper right corner?Then click the corresponding button, you can display the Help information in the prompt area.+1,2,3,4 examples of the text can be displayed. Address: Http://www.gagis.cn/gares/gacalc
Address: Http://www.gagis.cn/gares/gaexample (recommended look at the instructions first ) Copyright note: The project’s author is Enkimute, project source see: Https://github.com/enkimute/ganja.js Function Description:
1) The main interface
2) space selection (① area in the interface) select a specific space to filter the case
3) case selection (② area in the interface) Select the case to be demonstrated with the color corresponding to the space in the ① area, which can be filtered by clicking on a specific space in the ① area.
4) View (③ area in the interface) after selecting a case, a graphic is displayed in the view, and some of the graphics can be manipulated by the mouse.
5) Code area (④ area in the interface) after selecting a case, the code for the case is displayed in the area, which can be modified directly, and a run Change button appears in the View area to show the changes in real time in the view. Address: Http://www.gagis.cn/gares/gaexample
Holographic information Map: 全息地图
Geography Scene: 地理场景
GIS data model is the basis of GIS data expression, organization, collection, analysis and transmission, and it is always the frontier and hotspot of GIS research.However, the existing GIS data model focuses on the expression of space or geometry, and the expression of time often adopts the discrete way, which leads to the imperfect expression of space, weak expression of time, insufficient expression of semantic and physical attribute and lack of expression of space-time relation.As an algebraic method to describe geometric problems, geometric algebra has the characteristics of unification of geometry and algebra, unification of time and space, multidimensional unification and unification of space-time expression and computation, and it is an effective mathematic tool to help GIS data model break through the above obstacles. Read More