diff --git a/notebooks/classify/wradlib_2d_hmc.ipynb b/notebooks/classify/wradlib_2d_hmc.ipynb
index ef00cd13..0c258ac9 100644
--- a/notebooks/classify/wradlib_2d_hmc.ipynb
+++ b/notebooks/classify/wradlib_2d_hmc.ipynb
@@ -352,7 +352,7 @@
     "fig = pl.figure(figsize=(8, 7))\n",
     "cmap = mpl.cm.viridis\n",
     "cgax, im = wrl.vis.plot_rhi(bheight/1000., r=r/1000., th=el, \n",
-    "                            cg=True, cmap=cmap,\n",
+    "                            proj='cg', cmap=cmap,\n",
     "                            ax=111, fig=fig)\n",
     "cbar = pl.colorbar(im, fraction=0.046, pad=0.1)\n",
     "cbar.set_label('Height [km]')\n",
@@ -396,7 +396,7 @@
    "source": [
     "fig = pl.figure(figsize=(10,5))\n",
     "cgax, im = wrl.vis.plot_rhi(rtemp, r=r/1000., th=el, \n",
-    "                            cg=True, cmap=cmap,\n",
+    "                            proj='cg', cmap=cmap,\n",
     "                            ax=111, fig=fig)\n",
     "cbar = pl.colorbar(im, fraction=0.046, pad=0.1)\n",
     "cbar.set_label('Temperature [°C]')\n",
@@ -545,7 +545,7 @@
     "for i, c in enumerate(prob):\n",
     "    cgax, im = wrl.vis.plot_rhi(np.ma.masked_less_equal(c, 0.),\n",
     "                                r=r/1000., th=el,\n",
-    "                                cg=True,\n",
+    "                                proj='cg',\n",
     "                                ax=gs[i], fig=fig)\n",
     "    cbar = pl.colorbar(im, fraction=0.046, pad=0.15)\n",
     "    cbar.set_label('Probability')\n",
@@ -574,7 +574,7 @@
    "source": [
     "fig = pl.figure(figsize=(10, 8))\n",
     "cgax, im = wrl.vis.plot_rhi(hmc_vals[11], ax=111, \n",
-    "                            cg=True, \n",
+    "                            proj='cg', \n",
     "                            r=r/1000., th=el,\n",
     "                            cmap='cubehelix', fig=fig)\n",
     "cbar = pl.colorbar(im, fraction=0.046, pad=0.1)\n",
@@ -616,9 +616,9 @@
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
     "cgax, im = wrl.vis.plot_rhi(hmc_idx[11], ax=111, \n",
-    "                            cg={'angular_spacing': 20.,\n",
-    "                                'radial_spacing': 12.,\n",
-    "                                'latmin': 2.5}, \n",
+    "                            proj={'angular_spacing': 20.,\n",
+    "                                  'radial_spacing': 12.,\n",
+    "                                  'latmin': 2.5}, \n",
     "                            r=r/1000., th=el,\n",
     "                            norm=norm, \n",
     "                            cmap=cmap, \n",
diff --git a/notebooks/classify/wradlib_fuzzy_echo_classify.ipynb b/notebooks/classify/wradlib_fuzzy_echo_classify.ipynb
index 9f6800ff..32fbfb4f 100644
--- a/notebooks/classify/wradlib_fuzzy_echo_classify.ipynb
+++ b/notebooks/classify/wradlib_fuzzy_echo_classify.ipynb
@@ -177,7 +177,7 @@
     "#   Horizontal reflectivity\n",
     "ax = plt.subplot(121, aspect=\"equal\")\n",
     "ax, pm = wradlib.vis.plot_ppi(np.ma.masked_invalid(dat[\"ref\"]), ax=ax)\n",
-    "ax = wradlib.vis.plot_ppi_crosshair(site=(0,0), \n",
+    "ax = wradlib.vis.plot_ppi_crosshair(site=(0,0,0), \n",
     "                                    ranges=[80,160,240])\n",
     "plt.xlim(-240,240)\n",
     "plt.ylim(-240,240)\n",
@@ -191,7 +191,7 @@
     "ax, pm = wradlib.vis.plot_ppi(np.ma.masked_array(cmap.astype(np.uint8), \n",
     "                                                 np.isnan(dat[\"ref\"])),\n",
     "                              ax=ax, cmap=\"bwr\")\n",
-    "ax = wradlib.vis.plot_ppi_crosshair(site=(0,0),\n",
+    "ax = wradlib.vis.plot_ppi_crosshair(site=(0,0,0),\n",
     "                                    ranges=[80,160,240])\n",
     "plt.xlim(-240,240)\n",
     "plt.ylim(-240,240)\n",
@@ -220,7 +220,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "livereveal": {
    "scroll": true
diff --git a/notebooks/fileio/wradlib_load_rainbow_example.ipynb b/notebooks/fileio/wradlib_load_rainbow_example.ipynb
index b06b7e52..c4367743 100644
--- a/notebooks/fileio/wradlib_load_rainbow_example.ipynb
+++ b/notebooks/fileio/wradlib_load_rainbow_example.ipynb
@@ -152,7 +152,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(8,8))\n",
-    "cgax, pm = wrl.vis.plot_ppi(data, r=r, az=azi, fig=fig, cg=True)\n",
+    "cgax, pm = wrl.vis.plot_ppi(data, r=r, az=azi, fig=fig, proj='cg')\n",
     "\n",
     "title = '{0} {1} {2} {3}\\n{4}E {5}N'.format(sensortype, sensorname, date,\n",
     "                                            time, lon, lat)\n",
@@ -184,7 +184,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "toc": {
    "colors": {
diff --git a/notebooks/fileio/wradlib_radar_formats.ipynb b/notebooks/fileio/wradlib_radar_formats.ipynb
index 6aa0db4d..ffc9d6ae 100644
--- a/notebooks/fileio/wradlib_radar_formats.ipynb
+++ b/notebooks/fileio/wradlib_radar_formats.ipynb
@@ -148,7 +148,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "im = wrl.vis.plot_ppi(data, fig=fig, cg=True)"
+    "im = wrl.vis.plot_ppi(data, fig=fig, proj='cg')"
    ]
   },
   {
@@ -373,7 +373,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "im = wrl.vis.plot_ppi(fcontent['dataset1/data1/data'], fig=fig, cg=True)"
+    "im = wrl.vis.plot_ppi(fcontent['dataset1/data1/data'], fig=fig, proj='cg')"
    ]
   },
   {
@@ -465,7 +465,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "im = wrl.vis.plot_ppi(data['SCAN0']['ZH']['data'], fig=fig, cg=True)"
+    "im = wrl.vis.plot_ppi(data['SCAN0']['ZH']['data'], fig=fig, proj='cg')"
    ]
   },
   {
@@ -546,7 +546,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "im = wrl.vis.plot_ppi(fcontent['scan0/moment_3']['data'], fig=fig, cg=True)"
+    "im = wrl.vis.plot_ppi(fcontent['scan0/moment_3']['data'], fig=fig, proj='cg')"
    ]
   },
   {
@@ -849,7 +849,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "livereveal": {
    "scroll": true
diff --git a/notebooks/fileio/wradlib_reading_dx.ipynb b/notebooks/fileio/wradlib_reading_dx.ipynb
index 922a1f77..8ee01ed9 100644
--- a/notebooks/fileio/wradlib_reading_dx.ipynb
+++ b/notebooks/fileio/wradlib_reading_dx.ipynb
@@ -191,7 +191,7 @@
     "# Plot PPI,\n",
     "ax, pm = wrl.vis.plot_ppi(two_scans[0], cmap=\"viridis\")\n",
     "# add crosshair,\n",
-    "ax = wrl.vis.plot_ppi_crosshair((0,0), ranges=[40,80,128])\n",
+    "ax = wrl.vis.plot_ppi_crosshair((0,0,0), ranges=[40,80,128])\n",
     "# add colorbar,\n",
     "cbar = pl.colorbar(pm, shrink=0.9)\n",
     "cbar.set_label(\"Reflectivity (dBZ)\")\n",
@@ -221,7 +221,7 @@
     "# Plot PPI,\n",
     "ax, pm = wrl.vis.plot_ppi(one_scan, cmap=\"viridis\", ax=ax, vmin=20, vmax=60)\n",
     "# add crosshair,\n",
-    "ax = wrl.vis.plot_ppi_crosshair((0,0), ranges=[40,80,128])\n",
+    "ax = wrl.vis.plot_ppi_crosshair((0,0,0), ranges=[40,80,128])\n",
     "# add colorbar,\n",
     "cbar = pl.colorbar(pm, shrink=0.5)\n",
     "cbar.set_label(\"Reflectivity (dBZ)\")\n",
@@ -235,7 +235,7 @@
     "# Plot PPI,\n",
     "ax, pm = wrl.vis.plot_ppi(two_scans[0], cmap=\"viridis\", ax=ax, vmin=20, vmax=60)\n",
     "# add crosshair,\n",
-    "ax = wrl.vis.plot_ppi_crosshair((0,0), ranges=[40,80,128])\n",
+    "ax = wrl.vis.plot_ppi_crosshair((0,0,0), ranges=[40,80,128])\n",
     "# add colorbar,\n",
     "cbar = pl.colorbar(pm, shrink=0.5)\n",
     "cbar.set_label(\"Reflectivity (dBZ)\")\n",
@@ -271,7 +271,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "toc": {
    "colors": {
diff --git a/notebooks/georeferencing/wradlib_coords_example.ipynb b/notebooks/georeferencing/wradlib_coords_example.ipynb
index 596a851a..58ce7195 100644
--- a/notebooks/georeferencing/wradlib_coords_example.ipynb
+++ b/notebooks/georeferencing/wradlib_coords_example.ipynb
@@ -119,7 +119,8 @@
    "source": [
     "coords, proj_radar = georef.spherical_to_xyz(coord[..., 0],\n",
     "                                             np.degrees(coord[..., 1]),\n",
-    "                                             coord[..., 2], sitecoords)\n",
+    "                                             coord[..., 2], sitecoords,\n",
+    "                                             squeeze=True)\n",
     "test = coords[0, 90, 0:960:60, 0]\n",
     "print(test)"
    ]
@@ -188,7 +189,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "toc": {
    "colors": {
diff --git a/notebooks/georeferencing/wradlib_georef_example.ipynb b/notebooks/georeferencing/wradlib_georef_example.ipynb
index 2633bd79..c1d2d338 100644
--- a/notebooks/georeferencing/wradlib_georef_example.ipynb
+++ b/notebooks/georeferencing/wradlib_georef_example.ipynb
@@ -81,7 +81,8 @@
     "proj_wgs84 = georef.epsg_to_osr(4326)\n",
     "polygons = georef.spherical_to_polyvert(r, az, 0, sitecoords, \n",
     "                                        proj=proj_wgs84)\n",
-    "polygons = polygons[..., 0:2]"
+    "polygons = polygons[..., 0:2]\n",
+    "polygons.shape"
    ]
   },
   {
@@ -99,6 +100,7 @@
    "source": [
     "cent_coords = georef.spherical_to_centroids(r, az, 0, sitecoords,\n",
     "                                            proj=proj_wgs84)\n",
+    "cent_coords = np.squeeze(cent_coords)\n",
     "cent_lon = cent_coords[..., 0]\n",
     "cent_lat = cent_coords[..., 1]"
    ]
@@ -172,7 +174,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "toc": {
    "colors": {
diff --git a/notebooks/match3d/wradlib_match_workflow.ipynb b/notebooks/match3d/wradlib_match_workflow.ipynb
index 7386aa62..d7cba0dc 100644
--- a/notebooks/match3d/wradlib_match_workflow.ipynb
+++ b/notebooks/match3d/wradlib_match_workflow.ipynb
@@ -450,7 +450,8 @@
     "\n",
     "# create gr polar grid and calculate aeqd-xyz coordinates\n",
     "gr_polargrid = np.meshgrid(r_gr, az_gr)\n",
-    "gr_xyz, rad = wrl.georef.spherical_to_xyz(gr_polargrid[0], gr_polargrid[1], elev_gr, (lon0_gr, lat0_gr, alt0_gr ))\n",
+    "gr_xyz, rad = wrl.georef.spherical_to_xyz(gr_polargrid[0], gr_polargrid[1], elev_gr, (lon0_gr, lat0_gr, alt0_gr ), \n",
+    "                                          squeeze=True)\n",
     "print(\"XYZ-Grid-Shape:\", gr_xyz.shape)\n",
     "\n",
     "# create gr poygon array in aeqd-xyz-coordinates\n",
@@ -1367,7 +1368,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "toc": {
    "colors": {
diff --git a/notebooks/visualisation/wradlib_plot_curvelinear_grids.ipynb b/notebooks/visualisation/wradlib_plot_curvelinear_grids.ipynb
index 56e906eb..450a3e8f 100644
--- a/notebooks/visualisation/wradlib_plot_curvelinear_grids.ipynb
+++ b/notebooks/visualisation/wradlib_plot_curvelinear_grids.ipynb
@@ -199,7 +199,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "ax, pm = wrl.vis.plot_ppi(ma, fig=fig, cg=True)\n",
+    "ax, pm = wrl.vis.plot_ppi(ma, fig=fig, proj='cg')\n",
     "t = pl.title('Simple CG PPI')\n",
     "t.set_y(1.05)"
    ]
@@ -228,7 +228,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "cgax, pm = wrl.vis.plot_ppi(ma, r=r, az=az, fig=fig, cg=True)\n",
+    "cgax, pm = wrl.vis.plot_ppi(ma, r=r, az=az, fig=fig, proj='cg')\n",
     "\n",
     "caax = cgax.parasites[0]\n",
     "t = pl.title('Decorated CG PPI')\n",
@@ -257,7 +257,7 @@
     "cg={'radial_spacing': 14.,\n",
     "    'latmin': 10e3}\n",
     "fig = pl.figure(figsize=(10,8))\n",
-    "cgax, pm = wrl.vis.plot_ppi(ma, r=r, az=az, fig=fig, proj=cg)\n",
+    "cgax, pm = wrl.vis.plot_ppi(ma, r=r, az=az, fig=fig, proj='cg')\n",
     "caax = cgax.parasites[0]\n",
     "t = pl.title('Decorated CG PPI')\n",
     "t.set_y(1.05)\n",
@@ -560,7 +560,7 @@
    "outputs": [],
    "source": [
     "fig = pl.figure(figsize=(10,8))\n",
-    "cgax, pm = wrl.vis.plot_rhi(ma1, r=r, th=th, rf=1e3, fig=fig, ax=111, cg=True)\n",
+    "cgax, pm = wrl.vis.plot_rhi(ma1, r=r, th=th, rf=1e3, fig=fig, ax=111, proj='cg')\n",
     "\n",
     "caax = cgax.parasites[0]\n",
     "t = pl.title('Decorated CG RHI')\n",
@@ -643,7 +643,7 @@
     "fig = pl.figure(figsize=(10,8))\n",
     "fig.subplots_adjust(wspace=0.2, hspace=0.35)\n",
     "for sp in subplots:\n",
-    "    cgax, pm = wrl.vis.plot_rhi(ma1, r, th, rf=1e3, ax=sp, cg=True)\n",
+    "    cgax, pm = wrl.vis.plot_rhi(ma1, r, th, rf=1e3, ax=sp, proj='cg')\n",
     "    caax.parasites=[0]\n",
     "    t = pl.title('CG RHI #%(sp)d' %locals())\n",
     "    t.set_y(1.1)\n",
@@ -687,7 +687,7 @@
     "labelpad = [1.25, 1.25, 1.1, 1.25, 1.25]\n",
     "fig = pl.figure(figsize=(10,8))\n",
     "for i, sp in enumerate(subplots):\n",
-    "    cgax, pm = wrl.vis.plot_rhi(ma1, r, th, rf=1e3, ax=sp, cg=True)\n",
+    "    cgax, pm = wrl.vis.plot_rhi(ma1, r, th, rf=1e3, ax=sp, proj='cg')\n",
     "    caax = cgax.parasites[0]\n",
     "    t = pl.title('CG RHI #%(i)d' %locals())\n",
     "    t.set_y(labelpad[i])\n",
@@ -857,7 +857,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.7.3"
   },
   "toc": {
    "colors": {