[accessibleimage] Re: Tactile arrows

BANA and the Canadian Braille Authority did some testing on tactiles, =
including arrows, and found that the easiest arrow to read was a =
straight shaft with an open arrowhead, spaced a bit from the end of the =
shaft. The full report of the testing can be found on the CBA web site - =
Report of Tactile Graphics sub-committee part 3.
Irene Miller
Acting Supervisor
LRC/Materials Resource Centre
12360 - 142 Street NW
Edmonton, Alberta T5L 4X9
www.lrc.learning.gov.ab.ca
Tel 780/427-5239, Fax 780/427-6683

-----Original Message-----
From: Smart, Heidi R. [mailto:hsmart@xxxxxxxxxx]
Sent: Tuesday, March 01, 2005 7:22 AM
To: accessibleimage@xxxxxxxxxxxxx
Subject: [accessibleimage] Re: Tactile arrows


Hello Don,

Are you asking about arrows specific to stairs or only in general?
We have set standards for arrowheads here at Purdue Univ. they are as =
=3D
follows:

The TAEVIS arrowhead is a triangular solid black fill with a 90=3DB0 =
angle =3D
at the tip and wide base.  The TAEVIS standard arrowhead measures as =3D
follows: 1/2" base, 3/8" sides, and 1/4" in height from tip to base. The =
=3D
maximum reduction for this arrowhead is 75%.  Further reduction of the =
=3D
arrowhead creates an arrow that is difficult to distinguish from a line.


Heidi Smart
TAEVIS, Tactile Graphics Specialist
Purdue University
hsmart@xxxxxxxxxx



-----Original Message-----
From: accessibleimage-bounce@xxxxxxxxxxxxx =3D
[mailto:accessibleimage-bounce@xxxxxxxxxxxxx] On Behalf Of Don Mccallum
Sent: Tuesday, March 01, 2005 9:12 AM
To: accessibleimage@xxxxxxxxxxxxx
Subject: [accessibleimage] Tactile arrows

Hi all,

I was wondering what experience people had with arrows (or stair =3D
symbols) on tactile diagrams?
For example, as anyone found any shape, design or size of arrow to be =
=3D
superior to others?
We are trying a 'saw-tooth' arrow.  Put simply, this a line that feels =
=3D
rough in one direction and smooth in the other, hopefully indicating =3D
direction.
Has anyone had experience with this?

Regards

Don

Don McCallum
Anglia Polytechnic University
d.j.mccallum@xxxxxxxxx
www.timp.org.uk


-----Original Message-----
From: accessibleimage-bounce@xxxxxxxxxxxxx
[mailto:accessibleimage-bounce@xxxxxxxxxxxxx]On Behalf Of Lisa Yayla
Sent: 01 March 2005 13:34
To: accessibleimage@xxxxxxxxxxxxx
Subject: [accessibleimage] Article Journal of Visual Impairments and =3D
Blindness


Hi,
Sending a notice about an article in the Feb 2005 issue of JVIB vol. 99 =
=3D
number 2 Tactile Graphics: An Evaluation of Substrates for Tactile Maps =
=3D
and Diagrams by Sarah Jehoe, Simon Ungar, Don McCallum and Jonathan =3D
Rowell.
Haven't read it yet, but surely a good read.
Regards,
Lisa

Lisa Yayla
Huseby Kompetansesenter
Oslo Norway
lisa.yayla@xxxxxxxxxx

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