在去年的「30天地图挑战赛」中，本公众号和张老师的「GISer学习团」公众号转发了很多国外大牛们的地图作品。详见（点击图片可以跳转至对应文章）:
1、这些制图大神的作品不仅好看，背后还有温馨的故事
2、能用开源软件制作出这么酷炫的地图，我是相当佩服的。
3、我从3200多幅地图作品中精选了100幅分享给你
4、送你100种在地图中呈现点数据的方法
从下个月1号（11月1日）开始，新一轮的地图挑战赛又要开始了，今年的挑战赛同样是一天一个专题，为了方便大家查看我做了一个思维导图，点击可以查看大图。
每个主题具体要做什么内容呢？以下是发起人做的说明:A map with blue colour or a map about something blueA map with red colour or a map about something redA map with green colour or a map about something greenA map with yellow colour or a map about something yellowAmonochromic image is composed of one color (or values of one color). So forexample black and white maps are valid here. See some inspiration from thegreat monochrome mapping competition (although those masterpieces took abit more than a day to make, probably).Whether you call it a grid or afishnet, the idea is to visualize something in a grid form.The magnificent third dimension!Visualize something in 3DMap not made with GIS softwareCan be anything from hand-drawn to a map made with excel or ASCII. Soget out your pen and paper or go crazy.Nothing stops you from doing almost all ofthe maps with raster data. But this day is dedicated to those lovely pixelsClimate change is one of thebiggest challenges of our time and the spatial community has an important roleto communicate this.Connectionsbetween something.Islands tend to look quite beautiful on maps. Could be also somethingelse than physical islands.Historical data, historical map style or something else.How land is used, within a city,region, country or continent? How has it changed?Missing data. We all hate that,right? How to map something that is missing?That is you and me. A classic theme for thematic maps.Oceans, lakes, rivers orsomething completely different.Visualizingmovement can be done with a static map or with an animation. I havewritten a blog postrecentlyon how to make a nimationswith QGISBoundariesare all around us. Some of them are visible and some of them are in our heads.Sweet hillshades, beautiful contours, highmountains or low valleys.It’s2020 and I’m just as fed up with COVID-19 as you are, but just can’t skip thistheme this year. Check this blog postforsome tips .As the whole challenge is much about learning and experimenting, thisday is dedicated to exploring new tools.What is meaningful big spatial data? What kind of spatial data is smallbut interesting?Topological maps, maps about planets, microscopic bacteria mapped ormaybe even something weirder.The world isn’tflat, so with this map you can emphase the roundness of ourplanet. You can use e.g. this QGIS plugin.No rules. You've made it thisfar, so do what you want. Just make a map.这次同样是不限制软件，不限制数据，大家自由发挥即可。期待这次能见到更多国内的作品。