Layer Estimates:

Layer: Marco_Polo_1271_1295 (ID:0)
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Extent:

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Layer: Bartolomeu_Dias_1486_1488 (ID:1)
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Layer: Cristovão_Colombo_1492 (ID:2)
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Spatial Reference: 4326 (4326)

Layer: Vasco_da_Gama_1497_1498 (ID:3)
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Layer: Pedro_Álvares_Cabral_1500 (ID:4)
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Spatial Reference: 4326 (4326)

Layer: Fernão_de_Magalhães_1519_1522 (ID:5)
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Spatial Reference: 4326 (4326)