When transforming a world image, there may be artifacts created by the Geographic Imager transformation engine. Below are the results of a WGS84 world image transformed into a Stereographic projection.
When we zoom into the problematic area, you can see up close how some artifacts affect the image after the transformation was performed.
To solve this issue, we are introducing a new projection method called Maximum: World Projection in Geographic Imager 3.2.
We are going to use the same world image used with the previous example and transform it into the stereographic projection. Take a close look at the Advanced Options.
Under the Performance/quality section, select Maximum / World Projections from the Precision drop-down list and click OK.
Below is the result of the transformation with the new method available in Geographic Imager 3.2.
Let’s take a close look at the same area where the problem happened with the previous version of Geographic Imager. Now the transformed image does not contain any artifacts.
This option is available since Geographic Imager 3.2. The official version of Geographic Imager 3.2 is available now.
Here we have placed point symbols for a MAP Point layer. However, we want to change the point angle using the Attribute values.
Below is the attribute table for the point data shown above. The field directionAngle is the field containing the symbol rotation value. With MAPublisher, it’s possible to assign this value to every symbol in this layer.
Open the Edit Schema dialog box from the MAP Attribute panel. Find the field called #Rotation from the attribute field list. This #Rotation field is hidden/invisible by default. Click the Visible option to enable it and click OK.
In the MAP Attributes panel, you can see that the #Rotation field shown. The values in this field is 0.00 degree for every point in the layer. We’ll assign the angle value from the directionAngle field to the #Rotation value .
Open the Apply Expression dialog box from the MAP Attributes panel. Enter the column name directionAngle for the Expression and ensure that the value will be applied to the field #Rotation.
Every value from the directionAngle field is now inherited by the #Rotation field.
As a result, the rotation angle is now applied to every point.
The origin of the rotation is at each point’s registration point. With Adobe Illustrator CS4 and earlier, the registration point is set at the centre of the point symbol. With Adobe Illustrator CS5, the registration point can be flexibly placed. This will be discussed with some examples in a later topic. Stay tuned!