mapping the world beyond web mercator - foss4g 2015

Mapping beyond web mercator

Ing. Andrea Aime

GeoSolutions

GeoSolutions

Italian SME

Expertise

• Image Processing, GeoSpatial Data Fusion

• Java, Java Enterprise, C++, Python

• JPEG2000, JPIP, Advanced 2D visualization

Supporting/Developing FOSS4G projects GeoServer, MapStore

GeoNetwork, GeoNode, Ckan

Clients

Public Agencies

Private Companies

http://www.geo-solutions.it

FOSS4G 2015, Seoul 14th-19th September 2015

Why Web Mercator

FOSS4G-EU 2015, Como 14th-17th July 2015

Why: it’s everywhere, it’s free

FOSS4G 2015, Seoul 14th-19th September 2015

Why: familiar

FOSS4G 2015, Seoul 14th-19th September 2015

Why: easy

FOSS4G 2015, Seoul 14th-19th September 2015

Why: fair to the dateline

FOSS4G 2015, Seoul 14th-19th September 2015

Some reasons to avoid web mercator

FOSS4G 2015, Seoul 14th-19th September 2015

One reason to rule them all

FOSS4G 2015, Seoul 14th-19th September 2015

Area distortion in web mercator

FOSS4G 2015, Seoul 14th-19th September 2015

Equal-area maps to the rescue

FOSS4G 2015, Seoul 14th-19th September 2015

Lambert azimuthal equal area

Mollweide

FAO example

FOSS4G 2015, Seoul 14th-19th September 2015

Distance perception

FOSS4G 2015, Seoul 14th-19th September 2015

http://braincrunch.tumblr.com/post/23672142073/mercators-egg

Equidistant maps to the rescue

FOSS4G 2015, Seoul 14th-19th September 2015

Example: weather radar maps

FOSS4G 2015, Seoul 14th-19th September 2015

https://weather.gc.ca/radar/index_e.html?id=xsm

Who ate my poles?!

FOSS4G 2015, Seoul 14th-19th September 2015

Polar stereographic

FOSS4G 2015, Seoul 14th-19th September 2015

http://www.add.scar.org/home/add6

Polar stereographic

FOSS4G 2015, Seoul 14th-19th September 2015

http://www.polarview.aq/ (also GeoServer powered)

FAO Species Distribution

FOSS4G 2015, Seoul 14th-19th September 2015

Handling all these projections

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Should be simple no?

FOSS4G 2015, Seoul 14th-19th September 2015

Some examples

FOSS4G 2015, Seoul 14th-19th September 2015

Focusing on the pacific

FOSS4G 2015, Seoul 14th-19th September 2015

Would really like to see

Americas here…

PDC Mercator, EPSG:3832

FOSS4G 2015, Seoul 14th-19th September 2015

Antactica was here…

Funny

Greenland

…

Lambert conf. conic, EPSG:2225

FOSS4G 2015, Seoul 14th-19th September 2015

?!!

Datum change, ED50, EPSG:4230

FOSS4G 2015, Seoul 14th-19th September 2015

UTM32N, EPSG:32632

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What’s going on?

FOSS4G 2015, Seoul 14th-19th September 2015

And then… AUTO codes

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Automate! With APH

FOSS4G 2015, Seoul 14th-19th September 2015

APH step 1: which data to read

FOSS4G 2015, Seoul 14th-19th September 2015

Requested

Read

APH step 2: cut excess data

FOSS4G 2015, Seoul 14th-19th September 2015

APH step 3: data wrapping

FOSS4G 2015, Seoul 14th-19th September 2015

Requested

Read

APH step 4: detect dateline crossing

FOSS4G 2015, Seoul 14th-19th September 2015

Let’s try again

FOSS4G 2015, Seoul 14th-19th September 2015

Focusing on the pacific

FOSS4G 2015, Seoul 14th-19th September 2015

PDC Mercator, EPSG:3832

FOSS4G 2015, Seoul 14th-19th September 2015

Lambert conf. conic, EPSG:2225

FOSS4G 2015, Seoul 14th-19th September 2015

Datum change, ED50, EPSG:4230

FOSS4G 2015, Seoul 14th-19th September 2015

UTM32N, EPSG:32632

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What’s cooking

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Data between 0 and 360

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APH step 2.5:dynamic densification

FOSS4G 2015, Seoul 14th-19th September 2015

Odds and ends

FOSS4G 2015, Seoul 14th-19th September 2015

That’s all folks!

Questions? info@geo-solutions.it

FOSS4G 2015, Seoul 14th-19th September 2015