lima

The Public Laboratory for Open Technology and Science Receives Support for Expanding Civic Science Programs

by warren on June 22, 2011 - 14:30

western-north-carolina, somerville-massachusetts, providence, portland, new-york-city, lima, gulf-coast, thermal-photography, spectrometer, near-infrared-camera, balloon-mapping,

Dear Grassroots Mappers / Public Laboratory community:

We have some great news to share: the Public Laboratory for Open Technology & Science has just been awarded a Knight News Challenge grant to support citizen-based, grassroots data gathering and research.

We are grateful to be working with all of you and want to let you know that we will be focused on further developing our hardware and software tools, and supporting on-the-ground initiatives.

Artisanal Kite Mapping: Villa Maria, Lima, Peru

by anita on February 13, 2012 - 21:19

Villa Maria, Peru, lima, kite mapping, home made kites,

** traducion al espanol abajo

We held another kite mapping session in Lima on Feb. 4, 2012: this time in Villa Maria district, an area on the far edges of the city known for absorbing large populations of new rural migrant families who move in from surrounding mountain and jungle provinces.

You can see the photos taken from the ground here: https://picasaweb.google.com/117256558637209065596/KiteMappingVillaMaria...

Lima, Peru: Kite Making/Ballon Mapping Workshop, U. of San Marcos

by anita on February 2, 2012 - 14:26

lima, Peru, kite-mapping, balloon-mapping, artisanal,

We held a Ballon Mapping and Kite Making Workshop on the Campus of San Marcos on Jan. 28, 2012 with a group of about 10 people from: Open Street Map Peru, Saberes Nomadas, and San Marcos Univ. (physics, geography, sociology, and geographic engineering depts.)

Video spectrometer setup with dimmer and sample platform

by warren on August 17, 2011 - 10:00

lima, Peru, spectrometer,

This worked really well! We need to better mark the exact area to place the sample, and use larger sample "smears" as it was hard to tell exactly when the sample was under the instrument.

Add new comment

Tail design variation on soda bottle rig

by warren on August 17, 2011 - 09:58

lima, Peru, kite-mapping, balloon-mapping,

This may require 2 bottles; i used a very tall bottle in Lima Peru. But it keeps the wings very steady and I think catches the wind better. It felt like a nice, elegant way to build a camera enclosure.

2 comments

Video tutorial: make an infrared camera

by warren on June 23, 2011 - 21:50

western-north-carolina, somerville-massachusetts, new-york-city, lima, gulf-coast, near-infrared-camera,

Add new comment

Lima, Peru (Infrared)

Formats:

TMS GeoTiff (31.0 mb) MBTiles Google Maps JPG (0.5 mb)

Order a print of this map.

Embed code:

Tags:

NIR

License:

Public Domain

Bounding box:

POINT(-76.9806166119 -12.1447781622)

POINT(-76.9674021433 -12.1281828279)

Capture date:

January 18, 2011

Publication date:

January 26, 2011

Mappers:

Jeffrey Warren

Roxana Garrido

Morflex

Diego Rotalde

FabLabLima

Cartographer:

Jeffrey Warren

OpenLayers viewer:

http://archive.publiclaboratory.org/peru/2011-01-18-lima-peru-morflex/tms/openlayers.html

Google Maps viewer:

http://archive.publiclaboratory.org/peru/2011-01-18-lima-peru-morflex/tms/googlemaps.html

Geotiff URL:

http://archive.publiclaboratory.org/peru/2011-01-18-lima-peru-morflex/lima-morflex-nrg-geo.tif

Geotiff filesize:

31.0

TMS URL:

http://archive.publiclaboratory.org/peru/2011-01-18-lima-peru-morflex/tms/

TMS tile type:

png

MBTiles URL:

http://archive.publiclaboratory.org/peru/2011-01-18-lima-peru-morflex/lima-morflex-nrg.mbtiles

JPG URL:

http://archive.publiclaboratory.org/peru/2011-01-18-lima-peru-morflex/lima-morflex-nrg.jpg

JPG filesize:

0.5

Field notes:

We flew at the athletic fields of Ricardo Palma University, on east side of Lima, and after a turbulent flight, the string broke, and the camera flew off, leaving us depressed and exhausted.

We had built a large airfoil-shaped balloon from three sleeping bags tied together with a 2 meter wide, 1/2 inch thick PVC tube which we found near the field. It generated so much lift in the light winds that it broke right through the 50-pound dacron kite string and flew away.

Luckily we'd put Beno's name and phone number on the camera rig, and he got a call that night; a friend picked up the camera 15 miles south of the launch site, and it was full of imagery from around 2 miles up (estimate). Amazing!

This camera had a bifocal filter, half infrared pass, half visible light pass. You can read more about this infrared balloon technique here:

http://publiclaboratory.org/tool/near-infrared-camera
http://publiclaboratory.org/wiki/ndvi

Cartographer notes:

This flight was unique because it was the first infrared/visible multispectral camera we'd attempted to fly on a high altitude flight. With the lucky break of recovering the camera even though the string broke, this dataset was amazing to work with -- I spent some hours making both an infrared and a visible stitched image, shown here:

An alternate version of this is viewable here, using a heat-map color gradient to represent the data using the NDVI, or Normalized Differential Vegetation Index technique:

Add new comment

Great band color tool from the American Museum of Natural History

by warren on June 5, 2011 - 13:39

gulf-coast, lima, new-york-city, somerville-massachusetts, western-north-carolina, balloon-mapping, near-infrared-camera,

Ned Horning, of the Biodiversity Informatics Facility at the AMNH's Center for Biodiversity and Conservation, made this great tool which lets you explore different bands from different imaging sensors, like Landsat 7 and MODIS.

http://biodiversityinformatics.amnh.org/tool.php?content_id=141

Add new comment

Grassroots Mapping awarded Honorary Mention at Prix Ars Electronica

by warren on June 2, 2011 - 20:49

gulf-coast, lima, new-york-city, portland, western-north-carolina, balloon-mapping,

The Grassroots Mapping project was recently awarded an Honorary Mention at the 2011 Prix Ars Electronica:

http://new.aec.at/prix/en/gewinner/#digital-communities

Congratulations and thanks to everyone who helped make this happen!

Since 1987, the Prix Ars Electronica has served as an interdisciplinary platform for everyone who uses the computer as a universal medium for implementing and designing their creative projects at the interface of art, technology and society.