My personal experience with AntennaWeb is based upon coverage studies done in central California?s Santa Barbara market and the results are universally inaccurate for two reasons: 1. The terrain database has marginal resolution, which results in reception predictions that are physically impossible. If one studies the terrain profile using using Delorme?s Topo USA, or by simply referencing a topo map, the prediction errors are obvious. 2. The software does not always correctly locate the receive location. However, the latest version of the software does allow the user to correct that error if they recognize it exists. However, correcting the receive location does not improve the resolution issue, if it is in play for the particular location. The TVFool product was consistently more accurate for my particular studies. Dale -----Original Message----- From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Richard Hollandsworth Sent: Friday, April 11, 2008 5:57 PM To: opendtv@xxxxxxxxxxxxx Subject: [opendtv] Re: (No To: opendtv@xxxxxxxxxxxxx On 12Feb2008, Centris website admitted that their (proprietary) study was based on antennaweb.org, as was cited in Dave Lung's 15Feb article: http://www.centris.com/pages/viewnews.aspx?newsID=34&SiteID=9 http://www.tvtechnology.com/pages/s.0015/t.11299.html Also note the current article reiterates that they ASSUMED outdoor antennas, despite their separate study indicating over 47% of OTA users used indoor antennas. PS: I find Longley-Rice model results from Radio-Mobile and www.tvfool.com to be quite accurate, although neither includes tree loss, attic/indoor loss, antenna gain and whether or not a Preamp is used. Which is why I plug Radio-Mobile propagation loss results into a spread sheet. holl_ands ================================= Doug McDonald <mcdonald@xxxxxxxxxxxx> wrote: Richard Hollandsworth wrote: > This appears to be simply more detailed data released from the Feb study. > > No one puts any credence in the Centris study: > http://www.tvtechnology.com/pages/s.0015/t.11299.html > > Because the Centris study simply used www.antennaweb.com > to predict coverage, REALLY?? Are you sure you know what you are talking about? (A rhetorical question ... you don't ...) Hint: look carefully! You'll figure it out. Doug McDonald ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com