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Trace: Mapping The Emerging Urban Landscape
by Alison Sant
917 Bryant Street
San Francisco CA, 94103
U.S.A.
Tel: +415 865 9500
Fax: +415 865 9502
info [@] tracemap [dot] net / ali [@] alisant
[dot] net
http://www.alisant.net
http://www.tracemap.net
KEYWORDS
wireless networks, locative media, mapping, mobile
devices, public art, Hertzian space, WiFi
ABSTRACT
Digital networks and wireless technologies
are radically reforming the contemporary notions
of urban place. As network technologies move away
from their hardwired roots, they are activating
an urban dynamic that is no longer based on referencing
static landmarks, but on a notion of the city
in which spatial references become events. These
developments imply a changing pattern of urban
reference in which invisible boundaries of connectivity
alternately thicken or marginalize the urban territories
they overlay. *TRACE* is a collaborative project,
by artist Alison Sant and programmer Ryan Shaw,
that examines the layering of physical space with
the on and off zones of the wireless network.
The project seeks to blend the corporeal experience
of the city with the invisible qualities of the
network, creating a narrative mapping of the hybrid
space between them. This mapping is one that challenges
purely static notions of public space to promote
a temporal logic of the city that reflects the
fluctuating character of the wireless network.
_____________________________
INTRODUCTION
Wireless networks and mobile devices
are radically reforming our contemporary notions
of urban place. As the traditional architectural
definitions of public and private are blurred
by the infiltration of portable electronics and
the invisible edges of wireless connectivity,
the dynamics of the urban environment grow progressively
more complex. Though these were once easily delineated
through the shades of the Nolli Map [1], they
are now blurred by the technologies of text messages
and cell phone calls that can reach us anywhere,
the phenomena of camera phone peeping, and the
interception of wireless transmissions.
In addition, as portable electronics become integrated
into the ways in which we navigate cities, our
relationship to place becomes one that is increasingly
mediated. Network technologies are moving away
from their hardwired roots, to a mobile computing
model in which both the network transmitters and
the technologies that access them are portable
[2]. These advances activate a new urban dynamic
that is no longer based on references to static
landmarks, but on a notion of the city in which
the events themselves become spatial references
[3].
Although they are not physically obvious, the
boundaries of wireless technology have profound
implications for our notion of the space of the
city. They suggest a changing model of urban reference
that is modified not only by patterns of communication
but also by zones of connection and disconnection.
Mobile phone connectivity, WiFi (Wireless Fidelity)
access, and ad-hoc networks [4] generate a series
of boundaries that continually reconfigure urban
space. Such networks may create density in public
spaces by overlaying free access or marginalizing
urban areas, as they become known as "dead
zones" in the connective tissue of mobile
communication.
*TRACE* [5] is a project that examines the layering
of physical space with the on and off zones of
the wireless network. The project seeks to blend
the corporeal experience of the city with the
invisible qualities of the network, creating a
narrative mapping of the hybrid space between
them. This mapping is one that challenges a purely
static notion of public space to promote a temporal
logic of the city that reflects the fluctuating
character of the wireless network.
*TRACE* borrows from the conventions of cartography
to produce a series of maps that visualize the
Hertzian landscape. Each map responds to a different
state of the wireless network, examining the binary
qualities of being on and off the network, in
locked or unlocked zones, and in areas of unique
or default node names. State changes are triggered
by participants' routes through the city, which
enact the relationship between the physical experience
of the urban landscape and the network. As surveyors
of this evolving landscape, they contribute to
a collaborative mapping of this hybrid terrain.
By making this topography visible, *TRACE* seeks
to reveal the intersection of the physical and
immaterial infrastructures of the city.
SECTION 1: NODE DYNAMICS
HERTZIAN FOOTPRINTS
Since the invention of radio transmission,
in the late nineteenth century [6], the technologies
of wireless electronics have increasingly crowded
the airwaves of the city. The relay of satellite
television, radio broadcasts, cell phone transmissions,
and WiFi hotspots fill the electromagnetic spectrum,
creating an invisible Hertzian space that overlaps
with the physical infrastructure of the city.
Although unseen, this landscape has its own physical
contours created by transmission ranges, signal
strengths, and frequencies. In addition, as Hertzian
space interacts with the physical landscape of
the city it creates a hybrid space of shadows
and hotspots that conform to the topography, architecture,
and weather patterns of the space it overlays
[7].
Hertzian space has a significant effect on the
way we occupy the physical space of the city.
Avoiding dropped calls in tunnels, finding locations
with strong signal to use a cell phone, or a WiFi
hotspot to check e-mail are familiar examples.
As our notions of physical space become increasingly
informed by the fluctuations of wireless technology,
our traditional points of urban reference also
shift [8].
Current projects in spatial annotation - the
process of inscribing space with an electronic
tag - offer examples of this changing orientation
[9]. These projects utilize location-sensing technologies,
including GPS (Global Positioning Systems) and
wireless networks, to augment physical space with
its digital double of media annotations. An annotation
might be a collaborative map, documenting one’s
memories or associations with a site [10]. Alternatively,
advertisers may use this space to broadcast a
nearby restaurant or an item on sale in a neighborhood
store. In addition, data on current traffic patterns,
weather conditions, or crime rates may also be
used to mediate one’s journey through the
city.
Generically, these examples can be qualified
as temporal data. Spatial annotation includes
media that may be revised by the day, hour or
minute. In turn, our understanding of the city
may become increasingly informed by temporary
references. When compared with the time scale
of architecture, a building constructed as a landmark
to last decades or centuries, this raises questions
about the structure of urban space. Do these changing
references begin to undermine a more permanent
architectural framework, including the iconic
landmarks of the clock tower, or church steeple?
As electromagnetic fields increasingly become
the carriers of data that inform our notions of
space, will they become new reference points to
the urban landscape, creating the Hertzian equivalent
of the landmark?
Thousands of WiFI hubs are installed in residential
and commercial spaces every week, each of which
further disintegrates the traditional architectural
boundaries between public and private space. A
typical WiFi hub may have a signal radius of 150
feet. Some of these hubs extend intentionally
and unintentionally into public space, creating
an invisible front porch to the houses, apartments
and businesses where they are installed. This
spatial phenomenon has produced new urban practices
in which neighbors or passers-by access unlocked
private networks to borrow bandwidth. As private
space is extended into the public realm, the margins
of the built infrastructure become increasingly
eroded by the use patterns that penetrate them.
Current debates over whether these WiFi signals
are part of the public commons or are the wireless
equivalent of stealing private property are especially
illustrative of the confusion between public and
private space.
As the traditional structures of urban reference
are intersected by the dynamics of an unseen landscape,
how are new means of orientation created? In his
essay entitled *Thinking About Cities as Spatial
Events*, Urban Planner, Michael Batty proposes
that "It is possible to conceive of cities
as being clusters of 'spatial events'…"[11]
He argues for a temporal understanding of the
life of the city as a means for appreciating the
profound effects of events that take place in
cities over short periods of time. Batty examines
examples as benign as pedestrian patterns at a
carnival to the significant chaos in Manhattan
on September 11, 2001, and proposes that, as a
discipline, urban planning focus on these temporal
events.
In addition, as both the corporeal and Hertzian
experiences of the city are examined as temporal
events, they reconfigure our notions of space
from the static to the temporary. This hybrid
landscape, and the urban patterns it creates,
are a further example of what Batty would refer
to as "spatial events". His model of
the event as a reference for urban activity offers
a context for understanding the dynamics of the
emerging wireless landscape and its impact on
city life. By focusing on the city as an ever-changing
experience, we may begin to register its’
ephemeral dynamics as significant mechanisms in
the creation of urban space.
"SPACE AS A PRACTICED PLACE"
If, as Batty suggests, the city is considered
as a system of spatial events, then space can
be re-examined as a construction of the actions
of its inhabitants. In his book *The Practice
of Everyday Life*, Michel de Certeau defines urban
space according to the patterns of those who use
it. He suggests that "…space is composed
of intersections of mobile elements. It is in
a sense actuated by the ensemble of movements
deployed within it . . . In short, space is a
practiced place" [12]. As described, walkers
inscribe a logic to the city through their daily
movements and intersections. In turn, space is
delineated by their itineraries.
De Certeau’s notion of the city can also
be extended to the dynamics of Hertzian space.
For example, as wireless networks are overlaid
onto the urban itinerary, one’s everyday
movements enact a series of ad-hoc networks as
Bluetooth devices collide [13], registering the
proximity of strangers [14]. In addition, as the
WiFI infrastructure grows organically out of the
use patterns of their administrators and users,
they similarly inscribe a logic to the city.
The decision to leave a WiFI node locked or unlocked
or to rename a base station communicates a bias
to those that "see" these nodes through
wireless devices. In addition, WiFI node names
and encryption states become vehicles to express
disparate attitudes about public access. An inflammatory
declaration of privacy like "Go Away!"
may be opposed by an open invitation to logon
in the form of a web site address "go http://192.168.168.4/airport"
[15]. In addition, companies like ZRNet [16] and
"Surf and Sip" [17], which offer paid
public access to the Internet in cafes differ
from free community networks like Manhattan’s
New York City Wireless [18], San Francisco’s
SFLAN [19], and the UK’s consume.net [20]
and free2air.org [21]. Cumulatively, these independent
dispositions create a spatial hegemony, which
informs patterns of collective activity.
Our understanding of physical space becomes complicated
by traces of electronic signals, the way they
are formatted, and the information they project
to us. The wireless network suggests a new subtext
to urban space. In turn, these transmissions change
our fundamental understanding of location. Instead
of responding purely to the physical space around
us, we also become engaged with the fleeting qualities
of wireless signal. These "states" of
the network begin to inform and direct our interactions
with the urban landscape as significantly as the
material landmarks on city maps.
SECTION 2: MAPPING THE CITY AS A SPACE
OF EVENTS
*TRACE*: PROJECT DESCRIPTION
*TRACE* is a project that examines the
interplay of wireless networks with the corporeal
experience of the urban landscape. The project
challenges purely static notions of the city to
promote an alternative perception that recognizes
both the fluctuating character of the network
as well as the ephemeral aspects of urban space.
In turn, the project seeks to understand the events
of the city through the spaces and experiences
they construct.
Borrowing from the conventions of cartography,
TRACE produces a series of maps that visualize
the wireless landscape. These maps are generated
by a software program that runs on a WiFi enabled
PDA. Each map responds to a different state of
the network, examining the binary qualities of
being in and out of WiFi range, in locked or unlocked
zones, and in areas of unique or default node
names (see figures 1-5). State changes are triggered
by participants' routes through the city, which
enact the relationship between the physical experience
of the urban landscape and the network.
*TRACE* maps the "state" of the wireless
network over the geographic point as a means for
understanding the evolving urban landscape. Inspired
by the notion in ancient Greek maps of space as
a system of relations, rather than an inventory
of locations [22], the project examines states
as the focus of the map. Although each node is
independently recognized within the project’s
software, these points are mapped according to
the conditions of the majority of nodes. *TRACE*
examines these nodes as related events that contribute
to a landscape, rather than as discreet incidences.
In turn, the project becomes a register of the
collective wireless landscape as it is impacted
by the discreet events of individual decisions.
TEMPORAL MAPS
By investigating the urban landscape
through the concept of the state, *TRACE* interprets
the city as a dynamic space that is perceived
through one’s subjective route. The project
employs the graphic conventions of mapping to
illustrate each state, and extends them over time
to create an evolving animation that characterizes
fluctuations in the wireless landscape. The project
borrows from the cartographic traditions used
throughout the history of mapmaking. Broadly,
these include the devices of projection, orientation,
a key or legend, naming, and field conditions
illustrations. In addition, specific maps draw
from the graphic conventions used in boundary,
topographic, aerial, and panoramic maps.
Most generally, projection in *TRACE* is used
to describe the binary state of being on or off
the network. While the vertical plan is used for
maps within range of WiFi zones, the panoramic
or perspective map is used for being out of range,
or in dead zones. The plan view is an official
and precise means of orientation. It is an "objective"
view, created through exact measurements. As a
survey of space, it is common to the official
depiction of geographic location. As a result,
it is a visual convention that is used to describe
features including sanctioned boundaries, lot
sizes, property lines and streets. *TRACE* adopts
this projection as a means for representing the
data detected about each node including signal
strength, node name, and encryption status. In
addition, by choosing a generic view, the project
removes geographic orientation while remaining
familiar to common forms of representation. This
evokes the idea of Hertzian space as a landscape,
and the participant as a surveyor of it. In comparison,
the panoramic or perspective map conveys a looser
interpretation of space. Generally an interpretive
illustration, not drawn to scale, it suggests
a subjective view of the landscape characteristic
of late eighteenth century maps [23].
SURVEY
Inspired by the poetic questionnaires
created by Yoko Ono, and other Fluxus artists
in the 1960s, *TRACE* employs the device of the
survey as a tool for understanding the hybrid
space created between the Hertzian state and the
physical landscape. As one uses *TRACE*, encountering
new states in the wireless landscape, their journey
is punctuated by a series of questions about the
city around them. These questions create parallels
between the fluctuations of the wireless network
and the ephemeral qualities of the city. They
are formulated to gather responses to urban events
that are both unmapped and temporary (see figure
6).
CONCLUSION
Hertzian space is radically reforming
our relationship to the physical landscape. Wireless
technologies undermine the traditional boundaries
of architectural space and create new margins
of public and private, on and off, lost and located.
The implications of this erosion have profound
effects on the ways in which we orient ourselves
to the city as well as the ways in which we conceive
of the construction of space. As our points of
urban reference are complicated by the fluctuations
of the Hertzian landscape, we have the opportunity
to reconsider the city as a temporal system, shaped
by spatial events. *TRACE* is a project that maps
the dynamics shaping this emerging urban landscape.
By examining the intersection of the physical
and immaterial landscapes, TRACE aims to provoke
new ways of understanding the contemporary life
of the city.
ILLUSTRATIONS
Figure 1. Alison Sant, *TRACE*:
Map A (Flash Animation 180 x 240 pixels, 2004-05).
The organizing grid used in map A draws from the
rural grid divisions of the American Land Ordinance
Act of 1785 in which land was systematically surveyed
into six-mile square townships, which were then
subdivided into 36 sections equaling one square
mile each. Map A evokes this constrained grid
to describe the state in which most nodes are
locked and have mostly default node names. The
lines of the grid are at ninety-degree angles,
and all set as a scale of the primary dimension,
20 x 20 pixels. As a node appears, it is rendered
according to these dimensions, and grows in proportion
if new nodes with the same name are added. The
mapping evokes the constraints of the grid and
a lack of customization, as the majority of node
names are factory-assigned.

Figure 2. Alison Sant, *TRACE*: Map
B (Flash Animation 180 x 240 pixels, 2004-05).
Map B, predominately unlocked nodes with default
node names visualizes the idiosyncrasies of stumbler
programs in which identical WiFi node names are
recognized as a common network. Map B borrows
from aerial maps in which an itinerary is illustrated
as a set of connecting destinations. As new nodes
with the same default node name are added, they
contribute to a growing array of interconnected
points. The pattern that is formed is unique to
each participant’s journey and is unconstrained,
to suggest their unlocked status.

Figure 3. Alison Sant, *TRACE*: Map
C (Flash Animation 180 x 240 pixels, 2004-05).
Map C, extends the metaphors used in Map A, but
distorts them as it applies to mostly locked nodes
with mostly unique names. Although the grid is
still present, the shapes are uniquely suited
to each node and are at varying angles. The map
suggest customization, but within the constraints
of a fixed system. Map C also borrows from U.S.
county maps in which boundary lines are modified
around cultural, political, and geographic features
as well as Sanborn maps in which property lines
are set, but unique to the specific footprint
of a building and lot size it occupies.

Figure 4. Alison Sant, *TRACE*: Map
D (Flash Animation 180 x 240 pixels, 2004-05).
Map D, is a map describing the "dead zone".
It is uniquely horizontal, requiring the user
to turn the PDA on its side to view it, and is
the only map drawn in perspective. The use of
perspective in Map D suggests a subjective and
unmeasured view appropriate to the dead zone as
it is a state in which WiFi detection is unavailable.
The mapping is derived from cartographic conventions,
typical of the methods of panoramic maps. Generally
not drawn to scale, they show the landscape as
a pictorial representation, emphasizing the subjective
view of the map-reader.

Figure 5. Alison Sant, *TRACE*: Map
E (Flash Animation 180 x 240 pixels, 2004-05).
Map E, mostly unlocked nodes with mostly unique
node names, draws from the conventions of topographic
contour drawings in which a boundary line articulates
uniform heights in a geographic area. Each shape
is highly unique, conforming to the specific landscape
it is derived from. The contours in Map E reinterpret
this graphic form to suggest unconstrained access
and unique node names. Each node illustration
is derived from the number of characters in its
name, producing a variety of shapes. As additional
nodes, with the same node name are added to the
map, they build upon the original node, creating
more complex shapes. The field is unconstrained
by the grid, evoking open access.

Figure 6. Alison Sant, *TRACE*: Question
(Flash Animation 180 x 240 pixels, 2004-05). *TRACE*
employs the device of the survey as a tool for
understanding the hybrid space created between
the Hertzian state and the physical landscape.
As one uses TRACE, encountering new states in
the wireless landscape, their journey is punctuated
by a series of questions about the city around
them. These questions create parallels between
the fluctuations of the wireless network and the
ephemeral qualities of the city. They are formulated
to gather responses to urban events that are both
unmapped and temporal.
All illustrations are copyrighted
© Alison Sant
REFERENCES AND NOTES
1. See Giambattista Nolli’s 1748
figure-ground map of Rome entitled "New Map
of Rome" in which he delineated public space
as white and private space as black. Published
online at http://www.lib.berkeley.edu/EART/maps/nolli.html
(accessed August 2005).
2. See William Mitchell’s discussion of
wireless transmitters in William Mitchell, *Me++*
(Cambridge: MIT Press, 2003) p. 49-52.
3. See Michael Batty’s discussion of the
city as clusters of spatial events in Michael
Batty, "Thinking About Cities as Spatial
Events", in *Environment and Planning B:
Planning and Design l29*, No. 1, pp. 1-2 (January
2002). See also Anthony Townsend, "Wired/Unwired:
The Urban Geography of Digital Networks",
http://urban.blogs.com/research/dissertation/index.html
(accessed August 2005), p. 119-133. See also Mitchell
(2003), p. 120-127.
4. Ad-hoc networks are formed when two wireless
devices, equipped with a transmitter and receiver,
come within range of one another. As opposed to
fixed networks, they do not require a base station.
The network is established between peers.
5. See project web site http://www.tracemap.net.
6. In the late nineteenth century, the technology
of radio transmission was defined by physicists
and inventors such as James Clerk Maxwell, Heinrich
Rudolph Hertz, and Guglielmo Marconi.
7. See Anthony Dunne and Fiona Raby, "Tunable
Cities", in *Architectural Design 68*, No.
11/12, pp. 78-79 (November-December 1998). Dunne
and Raby describe Hertzian space by observing
that, ". . . [H]ertzian space is actual and
physical even though our senses detect only a
tiny part of the electromagnetic spectrum. Images
of footprints of satellite TV transmissions in
relation to the surface of the earth, and computer
models showing cellular phone propagation in relation
to urban environments, reveal that hertzian space
is not isotropic but has an 'electroclimate' defined
by wavelength, frequency and field strength. Interaction
with the natural and artificial landscape creates
a hybrid landscape of shadows, reflections, and
hot points."
8. William Mitchell, *Me++* (Cambridge: MIT Press,
2003), p. 120. William Mitchell points out in
his book *Me++* that, "the most profound
effect of electronic tracking, inscription, and
interrogation techniques is, in combination and
on a large scale, to change the fundamental mechanics
of reference – the ways in which we establish
meaning, construct knowledge, and make sense of
our surroundings by associating items of information
with one another and with physical objects."
9. See current projects and open source code
created by the Locative Media Lab, http://locative.net
(accessed August 2005).
10. Many of the first forays into collaborative
mapping projects, including Urban Tapestries,
http://www.proboscis.org.uk/urbantapestries/,
Annotate Space, http://www.panix.com/%7Eandrea/annotate/,
and PDPal, http://www.pdpal.com draw from digital
data sets to present basemaps that illustrate
the geographic features of the city; including
road systems, public transport routes, and district
names, as a datum upon which to annotate information.
Although many collaborative mapping projects undermine
their own basemaps by layering them with communally
defined concepts of space - including participants’
emotions, itineraries and memories - these annotations
are inextricably linked to the predefined foundations
of the map the overlay. Common digital datasets,
like the U.S. Census Bureau’s TIGER databases,
are an expression of a singular notion of urban
space – one that favors the street over
the route, the static over the temporal, and the
formal over the subjective. The basemap promotes
an understanding of the city founded on a purely
geographic categorization of urban space, defined
by the Cartesian coordinate, the road system,
and the block plan. As contemporary projects are
created that build upon the datum of common basemaps,
they are structuring a collaborative notion of
space within this predefined conception of the
city. For a further discussion of the basemap
see Alison Sant, *Redefining the Basemap in Acoustic
Space: Trans Cultural Mapping* (Riga: The Center
for New Media Culture RICX, 2004) pp. 153-156.
11. Batty (2002), p. 1.
12. Michel de Certeau, *The Practice of Everyday
Life* (Berkeley: University of California Press,
1984), p.117.
13. Bluetooth is a specification for the use
of low-power radio communications to wirelessly
link phones, computers and other network devices.
14. See Eric Paulos and Elizabeth Goodman, *Familiar
Stranger Project: Anxiety, Comfort, and Play in
Public Places* in which "familiar strangers"
are detected on mobile devices via Bluetooth networks
and visualized as an ambient landscape, http://berkeley.intel-research.net/paulos/research/familiarstranger/
(accessed August 2005).
15. From author’s stumbler logs in San
Francisco, June 2004.
16. ZRNetService, http://www.zrnetservice.com
(accessed August 2005).
17. Surf and Sip Network, http://www.surfandsip.com
(accessed August 2005).
18. Anthony Townsend is an urban planner and
founder of NYC wireless. His thesis outlines a
project for Manhattan’s Bryant Park, one
of the first outdoor public places to provide
for 802.11 wireless access. He continues to work
toward providing free public wireless Internet
service to mobile users in public spaces throughout
the New York City metropolitan area. See New York
City Wireless, http://www.nycwireless.net (accessed
August 2005).
19. SFLAN, http://www.sflan.com (accessed August
2005).
20. Consume.net, http://www.consume.net/ (accessed
August 2005).
21. free2air.org, http://www.free2air.org/ (accessed
August 2005).
22. Christian Jacob, "Mapping the Mind"
in, *Mappings* Denis Cosgrove (ed.) (London: Reaktion
Books, 1999), pp. 40-41. In Christian Jacob’s
essay, he describes Erosthenes’ third century
BCE world map as an example of a map as networked
space: “If Ptolemy’s regional maps
were a catalog of positions, Eratosthenes’
world map was perhaps more like a relational database:
a device wherein a given place was meaningful
and relevant only as an element within a system
of relations. . . Erosthenes was interested in
the structure rather than the inventory. His map
relied on a set of notable points, each defining
its unique meridian and parallel. These lines
were not organized into a systematic grid, and
the aim of the map was not to locate points, but
to organize a space of summetria (commensurability).
. . It established a set of mathematical correspondences
between places that were not interrelated. . .
. Thus it allowed new kinds of journeys –
analogical and syllogistical ones…It was
thus possible to travel through the inhabited
world in an abstract and geometrical way, thanks
to this network of lines creating non-empirical
relationships between remote places."
23. For a broader discussion of planar and perspective
maps see Christine Boyer, "Topographical
Travelogues and City Views" in *The City
of Collective Memory: Its Historical Imagery and
Architectural Entertainments* (Cambridge: MIT
Press, 1998), pp. 203-291.
BIBLIOGRAPHY
Batty, Michael "Thinking About Cities
as Spatial Events", in *Environment and Planning
B: Planning and Design l29*, No. 1 (January 2002).
Cosgrove, Denis (ed.) *Mappings* (London: Reaktion
Books, 1999).
de Certeau, Michel *The Practice of Everyday
Life* (Berkeley: University of California Press,
1984).
Dunne, Anthony and Raby, Fiona "Tunable
Cities", in *Architectural Design 68*, No.
11/12 (November-December 1998).
Mitchell, William *Me++* (Cambridge: MIT Press,
2003).
Tuters, Marc (ed.) and Smite, Rasa *Acoustic
Space: Trans Cultural Mapping* (Riga: The Center
for New Media Culture RICX, 2004). Also available
online: http://locative.net/tcmreader/ (accessed
August 2005).
GLOSSARY
City as a space of events - A concept
proposed by Urban Planner Michael Batty in his
essay "Thinking about Cities as Spatial Events"
(2002) in which he argues for a temporal understanding
of the life of the city as a means for appreciating
the profound effects of events that take place
in cities over short periods of time.
Hertzian space - A term derived from the name
of German physicist Heinrich Rudolf Hertz (1857-1894)
who was the first to produce electromagnetic waves
artificially. The concept of Hertzian space was
popularized by Anthony Dunne in his book *Hertzian
Tales: Electronic Products, Aesthetic Experience
and Critical Design* (Royal College of Art, 1994)
and later expanded on in the 1998 essay "Tunable
Cities" co-authored with Fiona Raby in *Architectural
Design* (November-December 1998), as well as in
their book *Design Noir: The Secret Life of Electronic
Objects* (Birkhauser, 2001).
Temporal maps - Used by the author to describe
a cartographic technique in which spatial relationships
are illustrated over time.
AUTHOR BIOGRAPHY
Alison Sant is a media artist, with a
background in digital media and architecture.
Her work explores the city as both a site for
investigation and intervention and has often focused
on the hidden dynamics of the urban landscape.
Her most recent work, uses media technologies
to both capture the temporal events of the city
as well as to examine the ways in which these
technologies reform our notions of the urban landscape.
Her work as been exhibited nationally and internationally.
Sant teaches classes in new media at the San
Francisco Art Institute, Mills College, and the
California College of the Arts. She has been awarded
artist residencies at the Djerassi Resident Artists
Program in 2001, Headlands Center for the Arts
in 2000, and the Tryon Center for Visual Art in
1999. Sant is also a recipient of a 2003 Creative
Work Fund Grant and is currently an artist in
residence at UCSF Mount Zion. She received her
BFA from New York University in 1993 in the Departments
of Photography and Interactive Telecommunications
and received her Masters in Design at the College
of Environmental Design, University of California
Berkeley in 2004. Sant is currently an Artist
in Residence at the San Francisco Exploratorium.
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