Freeway Park Around Union Square

Selected for Google Maps and Google Earth

Comments (1)

Timothy Chase on October 4, 2011

This panorama consists of 36 photos taken 2011-10-02 between 10:19-24. 6827 x 2768 px, 360 x 133 degrees. I have just walked down from the apartments on the Northwest corner of First Hill. Following a concrete path, I passed by artificial waterfalls, then under the 8th Avenue bridge on the right, walking towards the skyscrapers. Freeway Park is behind the Convention Center and built over the I-5 Highway. It is fairly quiet, despite all the traffic underneath, and it offers good views of downtown, including close-up views of the short One and and tall Two Union Square left of center. This was nearly a hemisphere panorama. Short a few degrees at the top. However, this is a Mercator equatorial cylindrical projection that preserves angles which often just gets shortened to "cylindrical" even though there are other other cylindrical projections, such as the Lambert cylindrical equal-area projection and the equirectangular projection. With this projection a point source of light would project the sphere (in this case, the field of view) on to a cylinder wrapped around the sphere. With Lambert you project laterally out from the axis of the sphere into the cylinder. With the equirectangular lines of latitude are evenly spaced. So in terms of programming it is the "simplest" from which to do an interactive spherical panorama in which you are able to move around. But it sometimes gets referred to as a non-projection since it is simply cartesian representation of the polar coordinates. Using the Mercator equatorial, Two Union Square doesn't appear compressed at the top, unlike the skyscrapers in 5th and University, where the floors near the top get closer and closer together. Hugin seemed to have an easier time with this scene using the Mercator. To see the difference, please check out the equirectangular Freeway Park Around Union Square 2.

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Photo details

  • Uploaded on October 3, 2011
  • © All Rights Reserved
    by Timothy Chase
    • Camera: FUJIFILM FinePix F500EXR
    • Taken on 2011/10/02 10:19:22