OK this has bother me for quite awhile so I need to ask.
If you attach a raster reference the default location places with the upper left corner of the image at 0,0.
If you attach interactive it uses 2 opposite corners via data points.
The question is why is the origin of the file the UPPER left corner of the the BOTTOM left pixel? Why not at the corner of the image?
Hi David, As noted, if you attach a non-georeferenced image - the upper left corner of the upper left pixel is placed at location 0,0. The grid in the graphic below shows the extents of each pixel.
Once placed, the origin of the image is reported as the lower left corner of the lower left pixel as shown below. The Raster Origin is defined where the raster is located geographically. The accepted industry standard for the raster origin is the lower left corner of the raster, but it can vary depending on the format.
Why MicroStation doesn't place the Image Origin at the Design File origin is unknown to me.
Pick the tool. Adjust the settings. Follow the prompts.
Answer Verified By: DavidG
I wonder why this behavior bothers you, since usually it is probably more convenient to place a raster with no geo-reference interactively anyway, no?
Mine get place by the at UPPER left conner of the Lower left pixel. It bother me because the origin is not the placement point. When I scale an image it doesn't scale about the lower left or the upper right. It scales about the UPPER RIGHT corner of the LOWER LEFT pixel. Its really a strange place to establish an origin.
Edit, Ok I did some more experimenting. I was wrong it is not scaling about the point I mentioned, only appeared that way. It is placed Upper Left and scales about Lower Left as Inga stated. It just happens that the scale factor I use (because of the latitude I'm at) is almost exactly the distance between lower left corner and upper on placement. When I scale the image via pixel size 0,0 falls very very close to the upper left corner of the lower left pixel as the image shows.
My apologies for the confusion.
Were you interested in requesting that the Raster get inserted with the lower left corner being at 0,0 as opposed to the upper left?
BSW Solutions Manager
Yes I would request the Insertion point (currently upper left) and the origin (currently lower left) of the image be one and the same. Unless there is some valid reason for them to be different.
Because thats how we've always done it is an excuse not a valid reason.