Add test for issue #1106: Continents are off.

The fix for this issue is at 658ac44.

testing/vcs/CMakeLists.txt

@@ -291,6 +291,12 @@ cdat_add_test(vcs_test_taylor_2_quads
     ${cdat_SOURCE_DIR}/testing/vcs/test_vcs_canvas_background_update.py
     "${BASELINE_DIR}/test_canvas_background_update.png"
     )
+  cdat_add_test(vcs_test_boxfill_decreasing_latitude
+    "${PYTHON_EXECUTABLE}"
+    ${cdat_SOURCE_DIR}/testing/vcs/test_boxfill_decreasing_latitude.py
+    "${BASELINE_DIR}/test_vcs_boxfill_decreasing_latitude.png"
+    "${UVCDAT_GIT_TESTDATA_DIR}/data/decreasing_latitude.nc"
+    )
   cdat_add_test(vcs_test_boxfill_10x10_numpy
     "${PYTHON_EXECUTABLE}"
     ${cdat_SOURCE_DIR}/testing/vcs/test_boxfill_10x10_numpy.py

testing/vcs/test_boxfill_decreasing_latitude.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python
+import cdms2
+import cdutil
+import os
+import sys
+import vcs
+
+pth = os.path.join(os.path.dirname(__file__), "..")
+sys.path.append(pth)
+import checkimage
+
+f = cdms2.open(sys.argv[2])
+ice = f("variable_6")
+x = vcs.init()
+x.setantialiasing(0)
+x.drawlogooff()
+x.setbgoutputdimensions(1200, 900, units="pixels")
+
+#gm = x.createisofill()
+#gm.label = "y"
+gm = x.createboxfill()
+gm.boxfill_type = "custom"
+
+tmpl = x.createtemplate()
+#tmpl.blank()
+tmpl.data.priority = 1
+tmpl.data.x1 = .05
+tmpl.data.x2 = .95
+tmpl.data.y1 = .05
+tmpl.data.y2 = .90
+tmpl.title.priority = 1
+tmpl.box2.priority = 1
+tmpl.box2.x1 = .23
+tmpl.box2.x2 = .815
+tmpl.box2.y1 = .11
+tmpl.box2.y2 = .895
+tmpl.title.x = .5
+tmpl.title.y = .95
+
+tmpl.legend.priority = 1
+tmpl.legend.x1 = tmpl.box2.x1 - .05
+tmpl.legend.x2 = tmpl.box2.x2 + .05
+tmpl.legend.y1 = .03
+tmpl.legend.y2 = .055
+tmpl.max.priority = 1
+
+#tmpl.crdate.priority=1
+#tmpl.crdate.x=.8
+#tmpl.crdate.y=.95
+txt = x.createtext()
+txt.height = 20
+#txt.color=242
+txt.valign = "half"
+txt.halign = "center"
+
+tmpl.title.textorientation = txt.To_name
+tmpl.title.texttable = txt.Tt_name
+
+ice.long_name = "September sea ice fraction: 4xCO2 climate, no ocean albedo alteration "
+levs = vcs.mkscale(ice.min(), ice.max())
+
+cols = vcs.getcolors(levs)
+cols[0] = 240
+
+gm.levels = levs
+gm.fillareacolors = cols
+#gm.projection="polar"
+gm.datawc_y2 = 30
+gm.datawc_y1 = 90
+
+x.plot(ice, gm, tmpl, bg = 1)
+fnm = "test_boxfill_decreasing_latitude.png"
+x.png(fnm)
+ret = checkimage.check_result_image(fnm, sys.argv[1], checkimage.defaultThreshold)
+sys.exit(ret)
+