I don't know about your clouds, but I wouldn't use them. That's just me.
There are three ways to find the square tile objects.
1. The in-game clipboard maps of fields and such are stored in your map folder.
2. Create a new terrain named sqrtile and past the following text into the oba file.
3. Cull the objects out of the following text for your list
4. They're in the latest TE manual but it isn't posted.
Here's the text, I think they're all here, for a new terrain named sqrtile. Enjoy.
C01GMS000, aafac1m00, -13200.000, 100.000, 7920.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 0, 0, 0, 0, -1
C01GMS001, ttown2m00, 15840.000, 150.000, -47520.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 1, 0, 0, 0, -1
C01GMS002,amfact1m00, -2640.000, 100.000, 7920.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 2, 0, 0, 0, -1
C01GMS003, rdfct1m00, 7920.000, 97.000, 7920.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 3, 0, 0, 0, -1
C01GMS004,trptrn1m00, 18480.000, 0.000, 7920.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 4, 0, 0, 0, -1
C01GMS005, ref2m00, 26400.000, 0.000, 5280.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 5, 0, 0, 0, -1
C01GMS006, hq1m00, -23760.000, 100.000, 7920.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 6, 0, 0, 0, -1
C01GMS007, city4m00, -10560.000, 30.000, -10560.000, 0.0000, 0.0000, 0.0000, 768, 0, 36, -1.00, -1.0, -1, 7, 0, 0, 0, -1
F01GMS008, laf1m00, -29040.000, 10.000, -29040.000, 0.0000, 0.0000, 0.0000, 1280, 0, 36, -1.00, -1.0, -1, 8, 0, 0, 0, -1
F01VHE000, entpnt, 12559.284, 150.000, -19036.535, 0.0000, 0.0000,-1.5708, 1280, 0, 22, -1.00, -1.0, -1, 0, 0, 0, 0, -1
F02GMS000, laf4m00, -10560.000, 30.000, -31680.000, 0.0000, 0.0000, 0.0000, 1280, 1, 36, -1.00, -1.0, -1, 0, 0, 0, 0, -1
F03GMS000, maf1m00, 7920.000, 10.000, -29040.000, 0.0000, 0.0000, 0.0000, 1280, 2, 36, -1.00, -1.0, -1, 0, 0, 0, 0, -1
F04GMS000, port1m00, 18480.000, 0.000, -29040.000, 0.0000, 0.0000, 0.0000, 1280, 3, 36, -1.00, -1.0, -1, 0, 0, 2, 0, -1
F04GMS001, rdr2, -20123.004, 20.000, -19279.999, 0.0000, 0.0000, 0.0000, 1280, 3, 36, -1.00, -1.0, -1, 1, 0, 0, 0, -1
F05GMS000, saf1m00, 29040.000, 10.000, -29040.000, 0.0000, 0.0000, 0.0000, 1280, 4, 36, -1.00, -1.0, -1, 0, 0, 0, 1, -1
F05GMS001, town1m, 39600.000, 30.000, -29040.000, 0.0000, 0.0000, 0.0000, 1280, 4, 36, -1.00, -1.0, -1, 1, 0, 0, 1, -1
F06GMS000, vb1m00, 29040.000, 30.000, -13200.000, 0.0000, 0.0000, 0.0000, 1280, 5, 36, -1.00, -1.0, -1, 0, 0, 1, 1, -1
F07GMS000, vb2m00, 15840.000, 78.000, -5280.000, 0.0000, 0.0000, 0.0000, 1280, 6, 36, -1.00, -1.0, -1, 0, 0, 1, 1, -1
F08GMS000, flak1m00, -29040.000, 30.000, -2640.000, 0.0000, 0.0000, 0.0000, 1280, 7, 36, -1.00, -1.0, -1, 0, 0, 4, 1, -1
F09GMS000, vbrmt, -29135.964, 100.000, -13534.723, 0.0000, 0.0000, 0.0000, 1280, 8, 36, -1.00, -1.0, -1, 0, 0, 1, 2, -1
F10MPR000, mpr0, -21273.490, 0.000, -19306.232, 0.0000, 0.0000, 0.0000, 3072, 9, 9, -1.00, -1.0, -1, 0, 0, 0, 2, -1
F10OFC000, dbrief, -71101.965, 25.000, -18023.690, 0.0000, 0.0000, 0.0000, 1280, 9, 10, -1.00, -1.0, -1, 0, 0, 0, 2, -1
F10SHP000, cv, -71101.965, 0.000, -18023.690, 0.0000, 0.0000, 0.0000, 3328, 9, 26, -1.00, -1.0, -1, 0, 0, 4, 2, -1
F10SHP001, de, -68567.821, 0.000, -16888.602, 0.0000, 0.0000, 0.0000, 3328, 9, 26, -1.00, -1.0, -1, 1, 0, 0, 2, -1
F10SHP002, de, -73554.736, 0.000, -16888.602, 0.0000, 0.0000, 0.0000, 3328, 9, 26, -1.00, -1.0, -1, 2, 0, 4, 2, -1
F10SHP003, de, -72308.007, 0.000, -20213.212, 0.0000, 0.0000, 0.0000, 3328, 9, 26, -1.00, -1.0, -1, 3, 0, 0, 2, -1
F10SHP004, de, -69577.078, 0.000, -20094.476, 0.0000, 0.0000, 0.0000, 3328, 9, 26, -1.00, -1.0, -1, 4, 0, 0, 2, -1
F10SHP005, ca, -70622.994, 0.000, -14799.747, 0.0000, 0.0000, 0.0000, 3328, 9, 26, -1.00, -1.0, -1, 5, 0, 0, 2, -1
F11MPR000, mpr0, -21388.326, 0.000, -19207.509, 0.0000, 0.0000, 0.0000, 3072, 10, 9, -1.00, -1.0, -1, 0, 0, 0, 2, -1
F11SHP000, bb, -50123.242, 0.000, 23688.379, 0.0000, 0.0000, 0.0000, 3328, 10, 26, -1.00, -1.0, -1, 0, 0, 14, 2, -1
F11SHP001, de, -47589.098, 0.000, 24823.467, 0.0000, 0.0000, 0.0000, 3328, 10, 26, -1.00, -1.0, -1, 1, 0, 0, 2, -1
F11SHP002, de, -52576.013, 0.000, 24823.467, 0.0000, 0.0000, 0.0000, 3328, 10, 26, -1.00, -1.0, -1, 2, 0, 0, 2, -1
F11SHP003, de, -51329.284, 0.000, 21498.857, 0.0000, 0.0000, 0.0000, 3328, 10, 26, -1.00, -1.0, -1, 3, 0, 0, 2, -1
F11SHP004, de, -48598.355, 0.000, 21617.593, 0.0000, 0.0000, 0.0000, 3328, 10, 26, -1.00, -1.0, -1, 4, 0, 0, 2, -1
F11SHP005, ca, -49644.271, 0.000, 26912.322, 0.0000, 0.0000, 0.0000, 3328, 10, 26, -1.00, -1.0, -1, 5, 0, 0, 2, -1