Digital Methods for Art Historians

ryan clement

geocoding + GIS


data services librarian

what we're doing

  • GIS and mapping: basic concepts
  • geocoding with Awesome Table & Google Sheets
  • mapping with ArcGIS Online

Raster data

Raster data is stored as a grid of values which are rendered on a map as pixels. Each pixel value represents an area on the Earth’s surface.

Vector data

Vector data structures represent specific features on the Earth’s surface. Vectors are composed of discrete locations (x, y values) known as vertices that define the shape of the object. Organization of the vertices determines whether we are working with: point, line or polygon.

Raster data

image credit: National Ecological Observatory Network (NEON)

Vector data

image credit: National Ecological Observatory Network (NEON)

Coordinate Reference Systems


datum: what shape the earth is

projection: how you flatten that shape


partial address -> standardized address -> standardized coordinates

GIS Tools

mapping with ArcGIS online

First...what is GIS?

  • GIS stands for Geographic Information System
  • GIS is a tool used to capture, store, manipulate, analyze, manage, and present geographic data
  • The data used with GIS is spatial data (data that is referenced to points on the Earth)
  • GIS is not a map!

maps are made of layers

What are our possible layers?

  • basemap
  • locations of archaeological finds
  • locations of dealers/collectors
  • locations of museums
  • etc...

let's make a map!

ArcGIS Online: go/arcgisonline/

more resources for ArcGIS Online

harc0355 geocoding + gis

By Ryan Clement

harc0355 geocoding + gis

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