Blocking telemarketers and scammers with the iPhone

techknight — Tue, 24 Feb 2009 23:14:26 +0000

Recently I used QuickPWN to jailbreak my iPhone, and one of the great tools not available in the official App Store is iBlacklist. As other Canadians know, there’s been an unfortunate increase in telemarketing calls since the National Do Not Call List went into effect.

With iBlacklist, I just add a number to the blacklist, choose an action (auto-hang-up, straight-to-voicemail, etc), and I never have to receive an unwanted call or SMS again. The application keeps a log of what it has blocked:

That’s three unwanted calls in the last few days that I never even got a ring for! (According to 800notes.com, this particular caller purchased my information from a credit card company.)

Microsoft Tag

techknight — Thu, 08 Jan 2009 22:31:00 +0000

Just played with Microsoft Tag for the iPhone. It’s a system like QR codes, except that more information can be placed in a smaller space.
This tag will take you to techknight.com:

Map of Rogers-branded hotspots for iPhone use

techknight — Sun, 13 Jul 2008 04:29:00 +0000

I wasn’t going to buy an iPhone, but the last-minute data plan price reduction was just enough to change my mind. (It still feels like a deal with the devil of course…)

The data plan includes free wifi access at any Rogers-branded hotspot, so I decided to map out the locations. The address of each hotspot is provided by this website but requires processing in order to be usable by Google Maps.

Process

Downloaded the XLS version of the hotspot list
Converted it to CSV format and imported it into the database
Ran a modified version of this PHP script from Google that geocodes addresses into latitudes and longitudes
Wrote a PHP script that exports the database to KML format in a few different configurations

And presto! Here they are, viewed in Google Maps:

Rogers Wireless hotspots (352 entries, 142 KB)
Bell hotspots (704 entries, 292 KB)
Telus Mobility hotspots (127 entries, 54 KB)
All hotspots (1183 entries, 486 KB)

If you want to load the entries in Google Earth or another mapping tool, you can grab the raw KML files here:
http://www.techknight.com/kml

Update

I got someone with an iPhone to try loading the maps on their device. (Mine won’t arrive until next week.) It seems that KML support is spotty at best… In Safari the map loaded but wasn’t interactive, while the actual Google Maps application could not load an external resource. So for now these are useful only when you’re at your PC, about to leave home. :)

Screenshots

Issues

A few problems cropped up while geocoding. Addresses that returned french accents in the XML caused simplexml_load_string() to error out with “Entity: line 1: parser error : Input is not proper UTF-8″. A forum post here had a solution using iconv().

Another problem was that some addresses in the original file are out of date. For example, this entry for Emerald Hills Golf Club:

14001 Concession #5, Stouffville, ON

Doing a search for emerald hills golf club ontario, it looks like “Concession #5″ was renamed to “Warden Avenue”, which causes the lookup to fail.

Also, there are some perfectly valid entries that show up in Google Maps but return a GGeoStatusCode of G_GEO_UNKNOWN_ADDRESS (602) when querying for them using the geocoding API. Examples:

Suite 220, 10610 Airport Drive, Grande Prairie, AB
1 First Canadian Place, Toronto, ON
7585 Market Crossing, Burnaby, BC

I’m guessing that the database used by the geocoding API differs from the database used by Google Maps proper. Other addresses in the original list are simply misspelled. Anyway, I thought at first that I would manually get co-ordinates for such entries, but there are 151 of them so I’m going to pass on that. :) (I did do some manual updates using this tool for the few downtown Toronto locations that didn’t work though.)

I’ll try to get in touch with whoever is in charge of updates at canadianhotspot.ca… Maybe if I give them a list of the non-working entries they can fix them.