Keely Roth Ph D Sacramento Women in Data

Keely Roth, Ph. D Sacramento Women in Data Science August 23, 2016

§ Spatial data basics § Cartographic principles § Ways to get started § Resources

Maps are powerful tools for visualizing and analyzing. https: //tecnilogica. carto. com/viz/56 e 702 fe-4693 -11 e 5 -8 f 79 -0 e 853 d 047 bba/public_map

attributes associated with a location arise from a spatial process can be an object or a field http: //blog. rtwilson. com/wp-content/uploads/2012/01/Snow. Map_Points. png http: //freegeographytools. com/wp-content/uploads/2007/05/terrain-merge. jpg

More than just where it is…

http: //tinyurl. com/znqvvjn Spatial Reference Systems: Geographic Coordinate Systems Key Terms: • Geoid • Ellipsoid • Datum https: //www. e-education. psu. edu/natureofgeoinfo/sites/www. e-education. psu. edu. natureofgeoinfo/files/image/long_lat. gif http: //www. navipedia. net/images/thumb/2/29/Datum. png/400 px-Datum. png

http: //tinyurl. com/znqvvjn Spatial Reference Systems: Projected Coordinate Systems http: //www. progonos. com/furuti/Map. Proj/Normal/Cart. Def/Map. Def/Img/dev. Surfaces. png

https: //2015. foss 4 g-na. org/sites/default/files/slides/Intro%20 to%20 Spatial%20 Data%20 Analysis%20 in%20 Python%20 -%20 FOSS 4 G%20 NA%202015. pdf

https: //2015. foss 4 g-na. org/sites/default/files/slides/Intro%20 to%20 Spatial%20 Data%20 Analysis%20 in%20 Python%20 -%20 FOSS 4 G%20 NA%202015. pdf

What can we do with spatial data? ESRI: Spatial Analysis

Just because you can map it, doesn’t mean you should…

Slocum’s Map Elements: • frame and neat line • mapped area • inset • title & subtitle • legend • data source • scale • orientation https: //saylordotorg. github. io/text_essentials-of-geographic-information-systems/s 13 -03 -cartographic-design. html What does my map need on it?

How do I design something people want to look at? Visual Contrast Legibility Figure-Ground Organization Hierarchical Organization Balance ESRI MAP DESIGN

What to keep in mind when making maps BEFOR E I map this? § Should § Who is going to look at this map? § What is the key message (yes, just one) this map will carry? DURIN G § What spatial representation of my data will best highlight the information I want to present? § What colors & symbology emphasize my map’s information? § What is the appropriate spatial scale for my map? AFTER § Am I showing the data honestly? § Is my map easy to understand? § Is everything I’ve mapped essential?

How can I make a map and analyze my spatial data?

Choices, choices. . Platform: Desktop, Web, Mobile Software: Commercial v. Open Source Map Interface: Static v. Dynamic

Libraries: Packages: § sp § rgdal http: //spatial. ly/2013/12/introduction-spatial-data-ggplot 2/ § maps § maptools § rgeos § raster § ggmap https: //www. r-bloggers. com/mapping-san-francisco-crime/ § § § shapely GDAL/OGR py. QGIS pyshp pyproj Geo. Pandas Py. SAL Rasterio Fiona cartopy matplotlib http: //wrobstory. github. io/2013/04/python-maps-choropleth. html http: //matplotlib. org/basemap/users/examples. html

• development in Java. Script or Python • many data layers available

http: //xkcd. com/1688/large/

GENERAL KNOWLEDGE Geospatial Analysis (e-textbook by de Smith, Goodchild, Longley) A gentle introduction to GIS Coordinate systems, map projections, and geographic transformations (ESRI) SOFTWARE/TOOLS 13 Free GIS Software Options Open Source Geospatial Foundation R packages for spatial data analysis Spatial. ly: Visualisation, Analysis and Resources in R Intro to Spatial Data Visualization in R Geospatial Python GIS in Python Intro to Spatial Data Analysis with Python (You. Tube) How Mapbox Works Carto. DB Workshop by UCLA Mapshare Intro to Google Earth Engine API