An image data processing apparatus processes previously halftoned data that has been halftoned so that a proportion of dot formation corresponding to gradation values of an image reaches a first dot generation rate, as image data representative of the image. The scattered wave data may be collected by the same sensor that generated the pulse wave or by a different sensor. A simple method to accomplish this when depositing in-situ films is also disclosed. A second wedge plate is also provided for engagement with a second ramp on the base plate to further secure a second picture frame member to the first picture frame member, such as at a ninety degree angle relative thereto. The programmable current source is selectively adjusted by a combinational logic circuit. A frusto-pyramidal shaped, non-woven geotextile material provides an optimal shape and material for the body of the pot for growing strawberries.