SPATIAL COVERAGE OF TYPE “hydrographic features” IN THE ADL GAZETTEER

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There are 636,564 items of type “hydrographic features” in the ADL Gazetteer as of January 25, 2001.

The spatial coverage of the items is graphically shown by the tiled map below. Each tile represents a 10° × 10° area of the Earth's surface. The color of a tile reflects the number of items that overlap that tile; the lighter the color, the more items that overlap. The legend to the right of the map shows the correspondence between color and number of items.

The following table shows the spatial coverage numerically. Each cell in the table represents a 20° × 20° area of the Earth's surface centered at the indicated latitude and longitude. The value in a cell is the number of items that overlap that cell.

		Longitude
		-170	-150	-130	-110	-90	-70	-50	-30	-10	10	30	50	70	90	110	130	150	170
Latitude	80	30	171	35	101	260	336	305	525	93	1738	1355	226	193	228	197	151	155	20
	60	1419	3946	2524	1714	1218	927	1139	1267	5945	33834	21354	5512	4721	3247	1747	2666	1972	1104
	40	3	1	10655	33309	45178	23711	413	200	12911	22984	12561	6512	8158	1302	1627	4006	1166	0
	20	7	968	0	2937	15804	17101	66	144	7137	3957	3058	4734	3665	8682	12463	6040	231	67
	0	2	58	118	1	5327	23788	9382	1641	8568	26471	19453	2315	220	2681	30052	4805	5518	1316
	-20	434	580	50	4	0	17407	9518	592	27	3076	29591	4610	26	9	1181	3611	8000	9615
	-40	73	0	6	0	10	8717	3772	0	12	903	3934	28	464	0	840	749	4934	6012
	-60	0	0	0	0	0	1812	210	150	0	8	0	0	16	1	0	2	18	45
	-80	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0