Below is an expanded snippet as requested by @ethanrd. I followed
@JonathanGregory's suggestion and switched the `grid_mapping_name` and
`projected_crs_name` values. I also reformatted the `crs_wkt` to make it
easier to read. If you plug in the value from the original post, the file
should convert to netCDF. This file just has the bare minimum to cover the crs
and x-y locations. It is not the fully compliant CF file, as I haven't gotten
that far yet. Some history: the model spits out data in a custom text format,
and I was attempting to convert to netCDF to make it easier for others to use.
The model uses the old EASE Grid, not the newer 2.0 version. @marqh's comment
prompted me to check out the [WKT
specs](http://docs.opengeospatial.org/is/18-010r7/18-010r7.html), which [show
to identify WKT built using an older version of the
spec](http://docs.opengeospatial.org/is/18-010r7/18-010r7.html#196). So it
looks like the WKT I'm using from EPSG.io is outdated. I'm not well-versed
enough in WKT to update it presently.
```java
netcdf from_arc_grid {
dimensions:
x = 39;
y = 26;
variables:
double x(x);
x:long_name = "x coordinate of projection";
x:standard_name = "projection_x_coordinate";
x:units = "Meter";
int nsidc_ease_grid_north_25km;
nsidc_ease_grid_north_25km:grid_mapping_name =
"lambert_azimuthal_equal_area";
nsidc_ease_grid_north_25km:longitude_of_projection_origin = 0.0;
nsidc_ease_grid_north_25km:latitude_of_projection_origin = 90.0;
nsidc_ease_grid_north_25km:false_easting = 0.0;
nsidc_ease_grid_north_25km:false_northing = 0.0;
nsidc_ease_grid_north_25km:geographic_crs_name =
"GCS_Sphere_International_1924_Authalic";
nsidc_ease_grid_north_25km:horizontal_datum_name =
"Not_specified_based_on_International_1924_Authalic_Sphere";
nsidc_ease_grid_north_25km:reference_ellipsoid_name = "International 1924
Authalic Sphere";
nsidc_ease_grid_north_25km:semi_major_axis = 6371228.0;
nsidc_ease_grid_north_25km:inverse_flattening = 0.0;
nsidc_ease_grid_north_25km:prime_meridian_name = "Greenwich";
nsidc_ease_grid_north_25km:longitude_of_prime_meridian = 0.0;
nsidc_ease_grid_north_25km:projected_crs_name = "NSIDC_EASE_Grid_North";
nsidc_ease_grid_north_25km:longitude_of_central_meridian = 0.0;
nsidc_ease_grid_north_25km:crs_wkt =
PROJCS["NSIDC EASE-Grid North",
GEOGCS["Unspecified datum based upon the International 1924 Authalic
Sphere",
DATUM["Not_specified_based_on_International_1924_Authalic_Sphere",
SPHEROID["International 1924 Authalic
Sphere",6371228,0,AUTHORITY["EPSG","7057"]],
AUTHORITY["EPSG","6053"]],
PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4053"]],
PROJECTION["Lambert_Azimuthal_Equal_Area"],
PARAMETER["latitude_of_center",90],
PARAMETER["longitude_of_center",0],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,AUTHORITY["EPSG","9001"]],
AXIS["X",EAST],
AXIS["Y",NORTH],
AUTHORITY["EPSG","3408"]] ;
float fake_var(y, x);
fake_var:missing_value = -3.4028235E38f;
fake_var:long_name = "fake_var";
fake_var:coordinates = "x y";
fake_var:grid_mapping = "nsidc_ease_grid_north_25km";
fake_var:units = "m";
double y(y);
y:long_name = "y coordinate of projection";
y:standard_name = "projection_y_coordinate";
y:units = "Meter";
// global attributes:
:Conventions = "CF-1.7";
data:
x =
-1729986.943003976, -1704919.417143976, -1679851.8912839761,
-1654784.3654239762, -1629716.8395639763, -1604649.3137039763,
-1579581.7878439764, -1554514.2619839765, -1529446.7361239765,
-1504379.2102639766, -1479311.6844039767, -1454244.1585439767,
-1429176.6326839768, -1404109.1068239769, -1379041.580963977,
-1353974.055103977, -1328906.529243977, -1303839.003383977,
-1278771.4775239772, -1253703.9516639772, -1228636.4258039773,
-1203568.8999439774, -1178501.3740839774, -1153433.8482239775,
-1128366.3223639776, -1103298.7965039776, -1078231.2706439777,
-1053163.7447839777, -1028096.2189239777, -1003028.6930639776,
-977961.1672039776, -952893.6413439775, -927826.1154839775, -902758.5896239774,
-877691.0637639774, -852623.5379039773, -827556.0120439773, -802488.4861839772,
-777420.9603239772 ;
nsidc_ease_grid_north_25km = 1 ;
fake_var =
1667.6692, 1600.6313, 1383.8802, 1242.0479, 1029.6685, 936.45776,
828.88995, 797.6116, 725.4621, 722.60846, 719.2757, 688.6377, 615.24744,
615.727, 589.234, 561.66626, 534.04517, 530.23157, 500.45145, 466.29483,
387.02902, 341.3668, 257.10144, 239.1657, 205.0, 205.0, 205.0, 205.0, 205.0,
205.0, 205.0, 205.0, 205.0, 205.0, 205.0, 205.0, 205.0, 205.01683, 205.01294,
1671.1307, 1662.1647, 1563.2664, 1380.5562, 1239.3501, 1030.1027,
936.60925, 834.3774, 796.24316, 725.1207, 721.54004, 717.2908, 686.7519,
615.63, 616.3524, 591.1606, 565.6316, 539.508, 534.6084, 482.53415, 462.78027,
385.90796, 296.25885, 238.92244, 205.0, 205.0, 205.0, 205.0, 205.0, 205.0,
205.0, 205.0, 205.0, 205.0, 205.0, 205.0, 205.04216, 205.03383, 232.59724,
1699.3593, 1665.6464, 1596.4927, 1543.5199, 1339.8746, 1137.5507,
1043.4258, 936.863, 834.43475, 783.63605, 708.3317, 720.1765, 714.58795,
684.04156, 616.0452, 617.15894, 593.993, 572.10065, 549.24896, 524.8121,
491.95132, 430.44058, 314.72443, 232.49597, 205.0, 205.0, 205.0, 205.0, 205.0,
205.0, 205.0, 205.0, 205.02841, 205.02841, 205.0, 205.12534, 327.90073,
314.9465, 301.0779,
1703.5214, 1670.0665, 1667.3369, 1556.084, 1477.4391, 1284.2404, 1139.022,
1044.7275, 997.9504, 888.8829, 743.5883, 737.2321, 702.57874, 668.87213,
679.94946, 639.5634, 618.03265, 598.211, 601.6408, 569.72534, 546.22784,
509.46536, 316.63837, 205.06854, 205.0, 205.0, 205.0, 205.0, 205.0, 205.0,
205.02841, 205.08449, 205.19962, 205.20111, 205.18289, 205.47266, 692.5294,
471.48734, 383.9402,
1708.6459, 1741.8413, 1662.6558, 1570.4044, 1538.1487, 1471.0963, 1288.844,
1194.92, 1094.5859, 998.59424, 889.0004, 797.40015, 737.9417, 685.5752,
665.4116, 673.4193, 635.08606, 637.3434, 603.70435, 597.77313, 617.4955,
813.4537, 205.38863, 205.09479, 205.0, 205.0, 205.0, 205.0, 205.0, 205.08449,
205.19962, 205.36646, 533.6088, 533.6418, 205.61722, 692.518, 692.78107,
582.65753, 513.4857,
1762.441, 1747.5782, 1735.1123, 1661.5953, 1538.5953, 1530.1918, 1462.7273,
1343.358, 1257.9608, 1096.7577, 999.6101, 849.69305, 800.86365, 739.56274,
684.5412, 633.84485, 637.04254, 626.2405, 624.66675, 614.28253, 589.06635,
813.3728, 205.50923, 205.05258, 205.0, 205.0, 205.0, 205.0, 205.05608,
205.30888, 533.6088, 533.77856, 533.91626, 533.99756, 692.6615, 613.3648,
642.6252, 665.738, 664.3566,
1834.098, 1712.6528, 1741.3107, 1667.1663, 1580.4484, 1529.6447, 1519.3242,
1329.19, 1344.3364, 1306.4607, 1160.8256, 1001.4501, 859.6937, 806.23724,
743.04, 683.1945, 630.8026, 625.4645, 596.94775, 589.03406, 589.07983,
813.42255, 205.68297, 205.21175, 205.0, 205.0, 205.0, 205.0, 205.16534,
533.6059, 533.8878, 533.97235, 534.0, 534.2034, 692.8236, 692.96436, 693.0,
693.0, 693.0,
1836.3982, 1768.2614, 1749.5248, 1731.8792, 1585.8538, 1529.7852,
1516.9214, 1403.1202, 1403.422, 1418.7867, 1309.7406, 1174.5691, 1011.39764,
871.79865, 865.1643, 793.7436, 711.93207, 622.8396, 589.0, 589.0, 589.0563,
589.14294, 813.30554, 205.61856, 205.21175, 205.0, 205.0, 205.0, 205.21999,
533.6867, 533.9716, 534.0, 534.1917, 534.59717, 693.156, 693.05316, 693.0,
693.0, 693.0,
1894.1924, 1840.0977, 1816.8716, 1740.9686, 1593.9713, 1541.0651,
1514.9049, 1447.4691, 1384.5281, 1404.901, 1420.7001, 1316.2999, 1179.4514,
1084.441, 946.4858, 918.61127, 799.68274, 681.6114, 589.0433, 589.0, 589.0,
589.1694, 813.6523, 813.42365, 205.63799, 205.15916, 205.0, 205.0, 205.16391,
533.59924, 533.914, 534.0, 534.56537, 1657.171, 693.88776, 693.25244, 693.0669,
693.0, 759.1413,
1919.826, 1899.8077, 1850.1716, 1753.5385, 1727.1559, 1548.4854, 1523.2119,
1441.986, 1421.8821, 1384.8119, 1410.5525, 1427.5686, 1431.0393, 1193.6199,
1141.0457, 1024.4269, 963.42004, 829.0665, 589.2228, 589.0, 589.0, 589.1121,
813.72595, 813.7888, 813.3393, 205.37228, 205.05258, 205.0, 205.05464,
205.35693, 533.77045, 533.9716, 534.7522, 1658.0242, 1657.8549, 693.5905,
693.3924, 693.1943, 810.32245,
1916.8677, 1898.6039, 1882.6769, 1823.1418, 1741.6816, 1578.5299,
1479.2343, 1436.4941, 1423.0979, 1406.2247, 1389.8658, 1521.7025, 1505.3613,
1446.0398, 1293.6143, 1147.3684, 1126.4141, 1212.5907, 589.7096, 589.2666,
589.0703, 589.10767, 589.40594, 813.843, 813.52216, 205.76042, 205.05258,
205.0, 205.54375, 205.21927, 533.6277, 533.914, 535.1601, 1658.9225, 1658.4161,
694.7344, 694.7762, 1293.1703, 1348.4988,
1852.2799, 1923.5338, 1908.0535, 1900.9149, 1814.9977, 1651.266, 1538.8037,
1446.1113, 1408.2416, 1377.0646, 1400.6017, 1497.011, 1559.9365, 1587.1216,
1437.0786, 1301.3236, 1212.9928, 1212.9364, 1402.0242, 589.9254, 589.7066,
589.81696, 590.0911, 814.0539, 814.0952, 206.9128, 205.9906, 206.0732,
207.20384, 206.24074, 205.86145, 534.37305, 535.7426, 3492.8765, 1660.2894,
697.4469, 3493.158, 2280.8645, 1889.0016,
1793.0905, 1890.3955, 1907.9243, 2008.6223, 1918.5328, 1822.6978,
1561.8844, 1456.3507, 1393.1827, 1340.623, 1351.8551, 1446.4163, 1603.3896,
1653.6628, 1614.7091, 1378.5635, 1301.9514, 1213.133, 1213.1909, 1402.5244,
1402.3212, 1402.9199, 2460.0369, 590.29816, 815.272, 3492.7468, 208.81946,
208.33824, 6492.856, 1759.349, 535.65643, 535.0456, 1539.8656, 3495.1882,
3019.1829, 6494.647, 3495.7432, 2846.4236, 2293.1934,
1813.926, 1861.6526, 1903.226, 1973.5342, 2006.0195, 1853.0249, 1728.7468,
1549.7412, 1352.4491, 1266.0322, 1247.9811, 1329.8184, 1594.548, 1811.6636,
1793.6581, 1582.5719, 1302.1743, 1302.2859, 1214.49, 1214.5112, 1403.1327,
1403.5221, 2460.622, 590.78754, 815.7387, 3494.7717, 4389.8647, 2214.3916,
2771.652, 2498.2268, 4389.551, 1920.0123, 1750.7377, 2615.7295, 3145.381,
3749.2434, 3362.282, 2970.332, 2547.1814,
1777.8163, 1859.0912, 1906.2814, 1974.4171, 2058.386, 1978.9233, 1848.4207,
1653.8483, 1379.5443, 1257.5254, 1139.1401, 1139.3469, 1624.6567, 1882.0488,
1965.9009, 1948.5388, 1302.638, 1303.1387, 3497.7556, 3496.811, 1214.8357,
1403.6735, 2461.0361, 590.55164, 815.0604, 1911.9514, 2621.6926, 2575.646,
2528.9116, 2376.4634, 2611.5413, 2224.9866, 2104.2786, 2577.6401, 3082.2375,
3085.8528, 3098.174, 2879.5906, 2688.4648,
1764.4244, 1828.2345, 1888.253, 1952.5411, 2042.3264, 2238.2021, 2174.6716,
1799.267, 1543.2142, 1297.1641, 1139.2643, 1139.5691, 1881.4862, 2103.5586,
1966.0468, 1948.68, 1302.7925, 1303.8992, 3498.9954, 3497.8792, 1214.6901,
1646.5715, 1595.8993, 1246.7363, 1369.588, 1702.3994, 2112.3606, 2454.5334,
2478.3987, 2284.9697, 2275.6423, 2102.7283, 2429.367, 2465.4727, 2840.3179,
2825.8884, 2850.8464, 2784.49, 2665.8804,
1718.6046, 1794.8638, 1877.3363, 1969.0251, 1997.7479, 2144.947, 2138.2874,
2099.7646, 1817.1332, 1139.8975, 1139.5016, 1140.075, 1881.9976, 2103.6313,
2103.7764, 1965.9026, 1949.2183, 1304.675, 2730.1772, 2765.9087, 2253.3982,
1949.9802, 1629.7665, 1353.1683, 1480.873, 1732.5785, 2051.753, 2378.937,
2446.097, 2206.1025, 2148.4534, 2368.8027, 2654.6575, 2429.1726, 2747.0376,
2904.7588, 2711.7297, 2700.2083, 2631.819,
1685.0023, 1760.5691, 1888.5703, 1987.9873, 2146.2764, 1896.4961,
1896.7046, 2353.752, 2012.221, 2011.868, 1140.4604, 2462.5278, 1882.9994,
1882.6903, 2103.9534, 1966.4017, 1950.3428, 6500.7085, 3488.4758, 2878.9229,
2594.8652, 2204.802, 1776.953, 1542.9617, 1613.0967, 1745.0978, 2001.3356,
2390.0403, 2384.7021, 2126.9602, 2091.6455, 2231.2615, 2688.1504, 2398.241,
2688.7188, 2770.1914, 2788.3667, 2619.468, 2598.233,
1601.6554, 1685.8271, 2040.5292, 2040.8624, 2278.431, 1897.0819, 1897.9906,
2354.286, 2013.2153, 3499.502, 1141.6252, 2463.6436, 4394.082, 2553.5327,
2185.3118, 2302.386, 2552.0383, 3491.221, 3341.5325, 2998.9543, 2713.1392,
2475.051, 2207.2266, 1585.8168, 1768.311, 1813.2218, 1985.244, 2347.249,
2317.3423, 2112.8645, 2295.0125, 2431.6033, 2706.4424, 2371.9866, 2648.929,
2715.8718, 2740.058, 2804.405, 2558.388,
1453.1942, 1453.3436, 1453.7155, 2040.5779, 2278.7551, 1897.912, 6502.519,
2355.1963, 2013.2517, 3500.3945, 1141.3937, 2463.6196, 2676.9302, 2550.3787,
2360.5242, 2478.3606, 2636.4678, 2840.4897, 2919.1099, 2861.9917, 2671.157,
2470.295, 2312.865, 1811.0321, 1803.3445, 1842.2676, 1672.5413, 2324.2063,
2272.6497, 2087.9194, 2249.463, 2437.6487, 2716.3655, 2350.0679, 2619.9785,
2665.2917, 2705.6316, 2701.7534, 2762.2524,
1453.3206, 1453.6749, 1453.901, 1454.434, 2041.37, 2279.8994, 3326.202,
3037.0286, 2558.9536, 2570.1707, 2165.9854, 2301.4426, 2452.9678, 2458.5056,
2324.5159, 2641.0852, 2646.7827, 2633.2043, 2729.1658, 2694.9475, 2661.8206,
2553.631, 2349.6697, 2034.855, 1826.9413, 1849.5292, 1816.9027, 2311.6462,
2378.8582, 2272.8325, 2228.3386, 2482.9895, 2918.7112, 2769.8408, 2597.9568,
2634.0454, 2667.2214, 2676.9048, 2744.7961,
1893.442, 2465.146, 2465.5337, 2466.6724, 3149.46, 3732.2578, 3709.0935,
3418.0312, 3031.6562, 2534.7842, 2307.0352, 2333.139, 2390.268, 2457.0278,
2273.3552, 2671.3665, 2647.7324, 2599.4822, 2629.165, 2623.177, 2673.639,
2507.4556, 2390.5342, 2093.583, 2012.879, 1859.59, 1877.727, 2141.3372,
2151.4094, 2247.2808, 2278.3223, 2695.0815, 2927.9539, 2769.0503, 2580.6628,
2610.139, 2642.1035, 2657.2253, 2651.9216,
2144.431, 2404.0876, 2919.3657, 4408.241, 4408.095, 6508.9556, 4535.4814,
3907.9006, 3415.207, 2950.5745, 2830.9404, 2377.2258, 2373.1028, 2435.0918,
2332.1184, 2617.5874, 2674.1086, 2632.4773, 2806.4966, 2573.2188, 2554.642,
2502.0178, 2303.2751, 2335.99, 1975.5845, 2166.781, 2112.0686, 1755.2678,
2134.9758, 2155.5896, 2256.1907, 2691.6484, 2933.6726, 2767.622, 2566.7485,
2591.3108, 2622.185, 2641.215, 2637.106,
2533.9775, 2885.5159, 3337.9722, 3855.6895, 3505.0732, 3505.219, 4170.714,
4124.779, 3838.8967, 3420.1367, 2816.2097, 2521.3706, 2366.852, 2331.5688,
2321.1252, 2541.9646, 2598.6748, 2683.799, 2768.121, 2575.3772, 2533.7993,
2492.617, 2399.1335, 2360.7708, 2109.1323, 2200.8032, 2118.5393, 1748.1138,
2123.122, 2141.4182, 2239.1445, 2716.2654, 2979.0427, 2765.822, 2555.3345,
2576.1365, 2594.7053, 2613.7024, 2624.6196,
2906.183, 3221.6003, 3732.7625, 4006.5708, 4415.4165, 4028.8335, 3988.1401,
4113.607, 4089.2922, 3489.6257, 3170.4888, 2841.285, 2542.6426, 2426.273,
2314.1702, 2631.608, 2623.216, 2670.9148, 2751.1199, 2768.3245, 2511.9236,
2508.8943, 2400.0405, 2265.8037, 2133.2334, 2227.4668, 2205.7126, 1985.6766,
2164.1272, 2130.689, 2225.8682, 2682.8875, 2949.8018, 3045.781, 2545.82,
2563.6738, 2579.8035, 2599.585, 2613.9438,
3168.247, 3626.869, 3843.3628, 4115.968, 4418.7603, 4161.348, 4013.4546,
4105.967, 4108.43, 3583.6033, 3360.78, 3154.0063, 3019.2446, 2495.156,
2278.1326, 2624.5344, 2608.8618, 2587.8606, 2668.6638, 2848.7437, 2710.4495,
2496.5667, 2404.6682, 2329.613, 2149.9753, 2357.1348, 2226.0796, 2462.0925,
2244.6748, 2122.4116, 2387.0222, 2718.6172, 2945.7063, 3047.3606, 2986.2878,
2553.2761, 2567.414, 2587.7053, 2592.2214 ;
y =
2205614.6174975215, 2180547.0916375215, 2155479.5657775216,
2130412.0399175216, 2105344.5140575217, 2080276.9881975218, 2055209.4623375218,
2030141.936477522, 2005074.410617522, 1980006.884757522, 1954939.358897522,
1929871.8330375222, 1904804.3071775222, 1879736.7813175223, 1854669.2554575223,
1829601.7295975224, 1804534.2037375225, 1779466.6778775225, 1754399.1520175226,
1729331.6261575227, 1704264.1002975227, 1679196.5744375228, 1654129.0485775229,
1629061.522717523, 1603993.996857523, 1578926.470997523 ;
}
```
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