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"# earth\n",
"\n",
" - \"AITOFF\" : Draw a contour via an AITOFF projection\n",
" - \"MERCATOR\" : Draw a contour via an Mercator projection\n",
" - \"SINUSOIDAL\" : Draw a contour via an Sinusoidal projection\n",
" - \"PARABOLIC\" : Draw a contour via an Parabolic projection\n",
" - \"MOLLWEIDE\" : Draw a contour via an Mollweide projection\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Olivier Couet (from an original macro sent by Ernst-Jan Buis) \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:36 PM."
]
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"gStyle->SetOptTitle(1);\n",
"gStyle->SetOptStat(0);\n",
"\n",
"TCanvas *c1 = new TCanvas(\"c1\", \"earth_projections\", 700, 1000);\n",
"c1->Divide(2, 3);\n",
"\n",
"TH2F *ha = new TH2F(\"ha\", \"Aitoff\", 180, -180, 180, 179, -89.5, 89.5);\n",
"TH2F *hm = new TH2F(\"hm\", \"Mercator\", 180, -180, 180, 161, -80.5, 80.5);\n",
"TH2F *hs = new TH2F(\"hs\", \"Sinusoidal\", 180, -180, 180, 181, -90.5, 90.5);\n",
"TH2F *hp = new TH2F(\"hp\", \"Parabolic\", 180, -180, 180, 181, -90.5, 90.5);\n",
"TH2F *hw = new TH2F(\"hw\", \"Mollweide\", 180, -180, 180, 181, -90.5, 90.5);\n",
"\n",
"TString dat = gROOT->GetTutorialDir();\n",
"dat.Append(\"/visualisation/graphics/earth.dat\");\n",
"dat.ReplaceAll(\"/./\", \"/\");\n",
"\n",
"ifstream in;\n",
"in.open(dat.Data());\n",
"Float_t x, y;\n",
"while (1) {\n",
" in >> x >> y;\n",
" if (!in.good())\n",
" break;\n",
" ha->Fill(x, y, 1);\n",
" hm->Fill(x, y, 1);\n",
" hs->Fill(x, y, 1);\n",
" hp->Fill(x, y, 1);\n",
" hw->Fill(x, y, 1);\n",
"}\n",
"in.close();\n",
"\n",
"c1->cd(1);\n",
"ha->Draw(\"aitoff\");\n",
"c1->cd(2);\n",
"hm->Draw(\"mercator\");\n",
"c1->cd(3);\n",
"hs->Draw(\"sinusoidal\");\n",
"c1->cd(4);\n",
"hp->Draw(\"parabolic\");\n",
"c1->cd(5);\n",
"hw->Draw(\"mollweide\");\n",
"\n",
"return c1;"
]
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"Draw all canvases "
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