the atlas seems to display the boundaries of your places by getting the geometry from the API via /v1/places/{id}. you can get information for up to 500 places in one request. beyond that, the request fails and responds like so:
{"error":"Too many IDs","status":422}
in this particular case, you’re dealing with more than 500 state- and county-level places, it seems, which means that this request fails (and probably should be broken up into multiple requests by the page):
https://api.inaturalist.org/v1/places/5,8,19,21,23,28,32,33,36,37,45,49,54,61,62,63,65,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,106,108,109,110,114,115,116,120,121,128,141,142,147,152,153,154,182,214,216,219,221,242,251,252,253,259,261,264,267,280,283,285,287,293,296,305,331,332,333,334,337,354,356,357,371,374,375,387,394,396,398,424,440,471,483,504,505,508,509,515,523,542,550,572,573,582,591,602,604,605,608,610,615,617,618,656,658,659,661,662,663,675,691,706,707,708,710,721,722,732,733,735,738,739,742,743,744,756,757,767,786,788,790,791,794,818,821,838,853,873,876,879,881,887,913,919,921,927,930,940,946,989,994,1022,1027,1034,1038,1039,1040,1041,1042,1043,1044,1046,1047,1051,1052,1053,1054,1056,1057,1058,1070,1071,1073,1074,1075,1096,1099,1102,1104,1106,1110,1111,1116,1117,1120,1122,1130,1133,1134,1136,1141,1172,1173,1175,1177,1183,1184,1186,1189,1190,1192,1227,1228,1235,1243,1246,1264,1266,1267,1268,1270,1271,1283,1292,1297,1298,1299,1300,1341,1342,1343,1354,1356,1357,1358,1364,1372,1373,1374,1375,1376,1398,1402,1404,1405,1406,1407,1409,1412,1413,1427,1434,1435,1436,1437,1444,1445,1446,1447,1448,1457,1459,1461,1463,1464,1468,1469,1470,1472,1490,1493,1494,1508,1522,1523,1536,1555,1564,1565,1566,1567,1568,1569,1576,1578,1581,1585,1588,1589,1590,1591,1592,1615,1617,1618,1639,1640,1649,1650,1651,1660,1662,1664,1676,1677,1679,1681,1682,1687,1688,1689,1690,1691,1692,1693,1694,1695,1696,1697,1698,1719,1720,1722,1724,1725,1726,1746,1775,1782,1818,1843,1844,1859,1864,1872,1873,1874,1875,1881,1887,1888,1889,1897,1900,1901,1906,1913,1932,1934,1946,1947,1948,1949,1950,1951,1952,1953,1954,1955,1956,1957,1958,1959,1960,1961,1962,1963,1964,1965,1966,1967,1968,1969,1970,1971,1972,1980,1982,1983,1985,1999,2001,2003,2007,2012,2032,2040,2041,2044,2045,2069,2074,2097,2102,2115,2139,2146,2150,2151,2171,2178,2181,2185,2186,2198,2200,2201,2203,2205,2206,2213,2225,2227,2229,2230,2255,2256,2257,2264,2270,2272,2274,2275,2292,2299,2300,2301,2303,2305,2306,2340,2341,2347,2357,2359,2360,2366,2399,2400,2401,2407,2408,2410,2443,2445,2448,2449,2462,2471,2505,2506,2540,2559,2563,2564,2589,2590,2591,2607,2610,2611,2612,2614,2616,2621,2622,2623,2653,2665,2666,2667,2670,2674,2675,2687,2690,2692,2697,2714,2723,2727,2771,2772,2778,2784,2786,2789,2815,2821,2825,2832,2842,2911,2913,2914,2915,2917,2922,2923,2927,2928,2929,2930,2931,2947,2952,2954,2957,2958,2970,2971,2972,2973,2975,2983,2988,2996,3020,3021,3030,3033,3043,3045,3049,3054,3059,13395,13406,13407,13408,13409,13410,13412,13416,13422,13430,13431,13432,13434,13435,13444,13445,13446,13451,13452,13453,13457,13464,13465,13467,13482,13483,13487,13508,13512,13513,13517,13519,13521,13524,48807,48809,48810,48813,48816,48818,48819,48820,48821,108237,108238,108242?per_page=500
