Demonstration of geography types in SQL server. Creates a state, then checks to see if two cities are in that state.

script.sql

DECLARE @ar geography;  
SET @ar = geography::STPolyFromText('POLYGON((-106.5715 31.8659,-106.5042 31.7504,-106.3092 31.6242,-106.2103 31.4638,-106.0181 31.3912,-105.7874 31.1846,-105.5663 31.0012,-105.4015 30.8456,-105.0032 30.6462,-104.8521 30.3847,-104.7437 30.2591,-104.6915 30.0738,-104.6777 29.9169,-104.5679 29.7644,-104.5280 29.6475,-104.4044 29.5603,-104.2067 29.4719,-104.1559 29.3834,-103.9774 29.2948,-103.9128 29.2804,-103.8208 29.2481,-103.5640 29.1378,-103.4692 29.0682,-103.3154 29.0105,-103.1616 28.9601,-103.0957 29.0177,-103.0298 29.1330,-102.8677 29.2157,-102.8979 29.2565,-102.8375 29.3570,-102.8004 29.4898,-102.7002 29.6881,-102.5134 29.7691,-102.3843 29.7596,-102.3047 29.8788,-102.1509 29.7834,-101.7004 29.7572,-101.4917 29.7644,-101.2939 29.6308,-101.2582 29.5269,-101.0056 29.3642,-100.9204 29.3056,-100.7707 29.1642,-100.7007 29.0946,-100.6306 28.9012,-100.4974 28.6593,-100.3601 28.4675,-100.2969 28.2778,-100.1733 28.1882,-100.0195 28.0526,-99.9344 27.9435,-99.8438 27.7638,-99.7119 27.6641,-99.4812 27.4839,-99.5375 27.3059,-99.4290 27.1948,-99.4455 27.0175,-99.3164 26.8829,-99.2065 26.6867,-99.0967 26.4116,-98.8138 26.3574,-98.6668 26.2257,-98.5474 26.2343,-98.3276 26.1357,-98.1697 26.0457,-97.9143 26.0518,-97.6643 26.0050,-97.4020 25.8419,-97.3526 25.9074,-97.0148 25.9679,-97.0697 26.1789,-97.2249 26.8253,-97.0752 27.4230,-96.6096 28.0599,-95.9285 28.4228,-95.3036 28.7568,-94.7296 29.0742,-94.3355 29.3810,-93.8205 29.6021,-93.9317 29.8013,-93.8136 29.9157,-93.7230 30.0489,-93.6996 30.1214,-93.7216 30.2021,-93.7038 30.2792,-93.7628 30.3278,-93.7587 30.3835,-93.7010 30.4380,-93.7024 30.5079,-93.7299 30.5362,-93.6694 30.6296,-93.6090 30.7466,-93.5527 30.8114,-93.5747 30.8834,-93.5307 30.9376,-93.5074 31.0318,-93.5266 31.0812,-93.5335 31.1787,-93.5980 31.1670,-93.6832 31.3055,-93.6708 31.3830,-93.6887 31.4369,-93.7202 31.5107,-93.8315 31.5820,-93.8123 31.6440,-93.8232 31.7188,-93.8342 31.7936,-93.8782 31.8309,-93.9221 31.8869,-93.9661 31.9335,-94.0430 32.0081,-94.0430 33.4681,-94.0430 33.5414,-94.1528 33.5689,-94.1968 33.5872,-94.2627 33.5872,-94.3176 33.5689,-94.3945 33.5597,-94.4275 33.5780,-94.4275 33.6055,-94.4495 33.6421,-94.4879 33.6329,-94.5236 33.6421,-94.6637 33.6695,-94.7461 33.7061,-94.8999 33.7791,-95.0757 33.8818,-95.1526 33.9251,-95.2254 33.9604,-95.2858 33.8750,-95.5399 33.8841,-95.7568 33.8887,-95.8420 33.8408,-96.0274 33.8556,-96.3528 33.6901,-96.6179 33.8442,-96.5836 33.8898,-96.6673 33.8955,-96.7538 33.8179,-96.8335 33.8613,-96.8774 33.8613,-96.9159 33.9388,-97.0917 33.7392,-97.1645 33.7449,-97.2180 33.8978,-97.3746 33.8225,-97.4611 33.8305,-97.4460 33.8761,-97.6945 33.9798,-97.8648 33.8476,-97.9651 33.8978,-98.0983 34.0299,-98.1752 34.1141,-98.3743 34.1425,-98.4773 34.0640,-98.5529 34.1209,-98.7520 34.1232,-98.9539 34.2095,-99.0637 34.2073,-99.1832 34.2141,-99.2505 34.3593,-99.3823 34.4613,-99.4318 34.3774,-99.5718 34.4160,-99.6158 34.3706,-99.8094 34.4726,-99.9934 34.5631,-100.0017 36.4975,-103.0408 36.5008,-103.0655 32.0011,-106.6168 32.0023,-106.5715 31.8659))', 4326); 

--Select @ar.ToString();

DECLARE @littlerock geography; 
SET @littlerock = geography::Parse('POINT(-92.504464 34.778538)');
--SELECT @littlerock.ToString();

DECLARE @dallas geography; 
SET @dallas = geography::Parse('POINT(-96.802873 32.772739)');
--SELECT @dallas.ToString();

SELECT @ar.STContains(@littlerock) as ArkansasContainsLittleRock, @ar.STContains(@dallas) as ArkansasContainsDallas;