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TileMill

TileMill. Quickly and Easily Design Maps for the Web Shaky Sherpa Matt Berg Modi Research Group The Earth Institute. Columbia University. Plan for tonight.

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TileMill

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  1. TileMill Quickly and Easily Design Maps for the Web Shaky Sherpa Matt Berg Modi Research Group The Earth Institute. Columbia University

  2. Plan for tonight.. • Importing a spreadsheet(from formhub)We we will walk through how to import a basic spreadsheet(csv) and ESRI Shapefileinto TileMill.  • Styling dataHere we show the basics of using Carto - a CSS-like language - to style your data in TileMill.  • Adding tooltips and legendsHere we show how to add tooltip interactivity and legends to maps.  • Exporting your mapHere we show how to export a map from TileMIll as a fully interactive map that can be shared on the web. 

  3. Geographic Information GEOGRAPHIC INFORMATION LOCATION ATTRIBUTE Where? Where? Where? Where? Where? What? What? What? What? Latitude (y) Longitude (x) Altitude (z) Latitude (y) Longitude (x) Altitude (z) Latitude (y) Longitude (x) Altitude (z) Latitude (y) Longitude (x) Altitude (z) Latitude (y) Longitude (x) Altitude (z) Information linked to location i.e. name, population, description Information linked to location i.e. name, population, description Information linked to location i.e. name, population, description Location represents where on the earth the items of interest are located Attribute provides information about what is occurring there

  4. Basics • GIS- Geographic Information System • (Recording, Analysis or Display of Data that is related to a location) • Map Projections • (Refers to method used for representing a 3D object like Earth on a 2D surface like paper or computer) • Coordinate systems • (Provide ways of describing a specific location on the earth. Using latitude and longitude or using distance in meters from the Equator)

  5. Features: Points, Lines, and Polygons Points households, populated place centroid, facility (school, health), water sources x,y coordinates Line roads, electricity grid, water pipelines, rivers series of x, y coordinates connected to form path/network Polygon boundary, administrative area, service area series of x, y coordinates connected to form enclosed area * Display Hierarchy: (1) Points, (2) Lines, and (3) Polygons

  6. What is a shapefile? A vector data storage format for storing the location, shape, and attributes of geographic features. A shapefile is stored in a set of related files and contains one feature class. • Shapefile Limitations: • Cannot store null values • Round up numbers • Poor support for Unicode character strings • Field names can not be longer than 10 characters • Cannot store both a date and time in a field • 2 GB size limit for any shapefile component file (max ~ 70 million point features) • May take up three to five times as much space as a geodatabase • Spatial queries take longer compared to a geodatabase feature class Source: ESRI ArcGIS Desktop Help and GIS Glossary

  7. Interface tour1. List of Projects 2. New Project

  8. 1. Main toolbar 2. Map Preview 3. Editing Tools 4. StyleSheet Editor Editing Interface

  9. 1. Map Preview 2. Zoom Controls and Full Page toggle M

  10. 1. Add Layer button 2. Geometry Icon 3.Layer Name 4. Inspect Layer Data 5. Edit Layer 6. Delete Layer

  11. 1. Active stylesheet 2. Inactive stylesheet 3. New stylesheet4. Line numbers 5. Text Area 6. Color Palette

  12. Adding Layers • TileMill supports creating map layers from following types of files and databases • CSV • ESRI Shapefile • KML(Google Earth) • GeoTIFF(Raster Data) • GeoJson • SQLite(spatial database) • PostGIS(spatial database)

  13. Layer Settings • ID – This is the name of the layer (can include letters, numbers, dashes or underscores) • DataSource (local files or url) • SRS(Spatial Reference System) -TileMillautodetects it but sometimes it needs be specified

  14. Project Settings • Tooltips (allows you to make your maps interactive with dynamic tooltips that appear when you hover or click on a feature (any point or polygon). Teaser – displays on hover Full – displays on click • Legend (allows you to make your maps interactive with dynamic tooltips that appear when you hover or click on a feature (any point or polygon).

  15. Carto • Similar to CSS (Cascading Style Sheet for Web) • Various types of Symbolizers: • Line (for lines & polygons) • Polygon (for polygons) • Point (for points) • Text (for points, lines, and polygons) • Shield (for points & lines) • Line Pattern (for lines & polygons) • Polygon Pattern (for polygons) • Raster (for rasters) • Markers (for points, lines, & polygons) • Buildings

  16. Exporting • MBTILES • PNG • PDF • SVG

  17. GIS Data Sources Natural Earth Global Administrative Areas (GADM) CloudMade (OSM data) NYC Open Data (cityagencies) geocommons

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