空间坐标系对应EPSG编号
WKT(Well-known text)是一种文本标记语言，用于表示矢量几何对象、空间参照系统及空间参照系统之间的转换。它的二进制表示方式，亦即WKB(well-known binary)则胜于在传输和在数据库中存储相同的信息。该格式由开放地理空间联盟(OGC)制定。
WKB(well-known binary) 是WKT的二进制表示形式，解决了WKT表达方式冗余的问题，便于传输和在数据库中存储相同的信息。
GeoJSON 一种JSON格式的Feature信息输出格式，它便于被JavaScript等脚本语言处理，OpenLayers等地理库便是采用GeoJSON格式。此外，TopoJSON等更精简的扩展格式。
SRID空间参考标识符 是与特定坐标系、容差和分辨率关联的唯一标识符。RID 的填充方式及其所示含义取决于存储数据所用的数据库。目前有多种公认的标准 SRID，例如欧洲石油测绘组 (EPSG) 定义的 SRID。
WKID（Well-known ID）空间参考的ID，常用语ArcGIS二次开发中。表示不同空间参考所对应的ID，例如WKID=4214表示GCS_Beijing_1954这种空间参考，4326代表WGS 84投影。我们常用到的、与中国相关的只有一百多个坐标参考，具体如下表所示：
- Geographic Coordinate System 地理坐标
| WKID | Geographic Coordinate System 地理坐标 |
|---|---|
| 4214 | GCS_Beijing_1954 |
| 4326 | GCS_WGS_1984 |
| 4490 | GCS_China_Geodetic_Coordinate_System_2000 |
| 4555 | GCS_New_Beijing |
| 4610 | GCS_Xian_1980 |
- Projected Coordinate System 投影坐标
| EPSG | 投影坐标系名称 | 经度最小 | 经度最大 | *经线 | 备注 |
|---|---|---|---|---|---|
| 4513 | CGCS2000 / 3-degree Gauss-Kruger zone 25 | 73.5 | 76.5 | 75 | 加代号 |
| 4514 | CGCS2000 / 3-degree Gauss-Kruger zone 26 | 76.5 | 79.5 | 78 | 加代号 |
| 4515 | CGCS2000 / 3-degree Gauss-Kruger zone 27 | 79.5 | 82.5 | 81 | 加代号 |
| 4516 | CGCS2000 / 3-degree Gauss-Kruger zone 28 | 82.5 | 85.5 | 84 | 加代号 |
| 4517 | CGCS2000 / 3-degree Gauss-Kruger zone 29 | 85.5 | 88.5 | 87 | 加代号 |
| 4518 | CGCS2000 / 3-degree Gauss-Kruger zone 30 | 88.5 | 91.5 | 90 | 加代号 |
| 4519 | CGCS2000 / 3-degree Gauss-Kruger zone 31 | 91.5 | 94.5 | 93 | 加代号 |
| 4520 | CGCS2000 / 3-degree Gauss-Kruger zone 32 | 94.5 | 97.5 | 96 | 加代号 |
| 4521 | CGCS2000 / 3-degree Gauss-Kruger zone 33 | 97.5 | 100.5 | 99 | 加代号 |
| 4522 | CGCS2000 / 3-degree Gauss-Kruger zone 34 | 100.5 | 103.5 | 102 | 加代号 |
| 4523 | CGCS2000 / 3-degree Gauss-Kruger zone 35 | 103.5 | 106.5 | 105 | 加代号 |
| 4524 | CGCS2000 / 3-degree Gauss-Kruger zone 36 | 106.5 | 109.5 | 108 | 加代号 |
| 4525 | CGCS2000 / 3-degree Gauss-Kruger zone 37 | 109.5 | 112.5 | 111 | 加代号 |
| 4526 | CGCS2000 / 3-degree Gauss-Kruger zone 38 | 112.5 | 115.5 | 114 | 加代号 |
| 4527 | CGCS2000 / 3-degree Gauss-Kruger zone 39 | 115.5 | 118.5 | 117 | 加代号 |
| 4528 | CGCS2000 / 3-degree Gauss-Kruger zone 40 | 118.5 | 121.5 | 120 | 加代号 |
| 4529 | CGCS2000 / 3-degree Gauss-Kruger zone 41 | 121.5 | 124.5 | 123 | 加代号 |
| 4530 | CGCS2000 / 3-degree Gauss-Kruger zone 42 | 124.5 | 127.5 | 126 | 加代号 |
| 4531 | CGCS2000 / 3-degree Gauss-Kruger zone 43 | 127.5 | 130.5 | 129 | 加代号 |
| 4532 | CGCS2000 / 3-degree Gauss-Kruger zone 44 | 130.5 | 133.5 | 132 | 加代号 |
| 4533 | CGCS2000 / 3-degree Gauss-Kruger zone 45 | 133.5 | 136.5 | 135 | 加代号 |
| 4534 | CGCS2000 / 3-degree Gauss-Kruger CM 75E | 73.5 | 76.5 | 75 | |
| 4535 | CGCS2000 / 3-degree Gauss-Kruger CM 78E | 76.5 | 79.5 | 78 | |
| 4536 | CGCS2000 / 3-degree Gauss-Kruger CM 81E | 79.5 | 82.5 | 81 | |
| 4537 | CGCS2000 / 3-degree Gauss-Kruger CM 84E | 82.5 | 85.5 | 84 | |
| 4538 | CGCS2000 / 3-degree Gauss-Kruger CM 87E | 85.5 | 88.5 | 87 | |
| 4539 | CGCS2000 / 3-degree Gauss-Kruger CM 90E | 88.5 | 91.5 | 90 | |
| 4540 | CGCS2000 / 3-degree Gauss-Kruger CM 93E | 91.5 | 94.5 | 93 | |
| 4541 | CGCS2000 / 3-degree Gauss-Kruger CM 96E | 94.5 | 97.5 | 96 | |
| 4542 | CGCS2000 / 3-degree Gauss-Kruger CM 99E | 97.5 | 100.5 | 99 | |
| 4543 | CGCS2000 / 3-degree Gauss-Kruger CM 102E | 100.5 | 103.5 | 102 | |
| 4544 | CGCS2000 / 3-degree Gauss-Kruger CM 105E | 103.5 | 106.5 | 105 | |
| 4545 | CGCS2000 / 3-degree Gauss-Kruger CM 108E | 106.5 | 109.5 | 108 | |
| 4546 | CGCS2000 / 3-degree Gauss-Kruger CM 111E | 109.5 | 112.5 | 111 | |
| 4547 | CGCS2000 / 3-degree Gauss-Kruger CM 114E | 112.5 | 115.5 | 114 | |
| 4548 | CGCS2000 / 3-degree Gauss-Kruger CM 117E | 115.5 | 118.5 | 117 | |
| 4549 | CGCS2000 / 3-degree Gauss-Kruger CM 120E | 118.5 | 121.5 | 120 | |
| 4550 | CGCS2000 / 3-degree Gauss-Kruger CM 123E | 121.5 | 124.5 | 123 | |
| 4551 | CGCS2000 / 3-degree Gauss-Kruger CM 126E | 124.5 | 127.5 | 126 | |
| 4552 | CGCS2000 / 3-degree Gauss-Kruger CM 129E | 127.5 | 130.5 | 129 | |
| 4553 | CGCS2000 / 3-degree Gauss-Kruger CM 132E | 130.5 | 133.5 | 132 | |
| 4554 | CGCS2000 / 3-degree Gauss-Kruger CM 135E | 133.5 | 136.5 | 135 | |
| 2401 | Beijing_1954_3_Degree_GK_Zone_25 | 73.5 | 76.5 | 75 | 加代号 |
| 2402 | Beijing_1954_3_Degree_GK_Zone_26 | 76.5 | 79.5 | 78 | 加代号 |
| 2403 | Beijing_1954_3_Degree_GK_Zone_27 | 79.5 | 82.5 | 81 | 加代号 |
| 2404 | Beijing_1954_3_Degree_GK_Zone_28 | 82.5 | 85.5 | 84 | 加代号 |
| 2405 | Beijing_1954_3_Degree_GK_Zone_29 | 85.5 | 88.5 | 87 | 加代号 |
| 2406 | Beijing_1954_3_Degree_GK_Zone_30 | 88.5 | 91.5 | 90 | 加代号 |
| 2407 | Beijing_1954_3_Degree_GK_Zone_31 | 91.5 | 94.5 | 93 | 加代号 |
| 2408 | Beijing_1954_3_Degree_GK_Zone_32 | 94.5 | 97.5 | 96 | 加代号 |
| 2409 | Beijing_1954_3_Degree_GK_Zone_33 | 97.5 | 100.5 | 99 | 加代号 |
| 2410 | Beijing_1954_3_Degree_GK_Zone_34 | 100.5 | 103.5 | 102 | 加代号 |
| 2411 | Beijing_1954_3_Degree_GK_Zone_35 | 103.5 | 106.5 | 105 | 加代号 |
| 2412 | Beijing_1954_3_Degree_GK_Zone_36 | 106.5 | 109.5 | 108 | 加代号 |
| 2413 | Beijing_1954_3_Degree_GK_Zone_37 | 109.5 | 112.5 | 111 | 加代号 |
| 2414 | Beijing_1954_3_Degree_GK_Zone_38 | 112.5 | 115.5 | 114 | 加代号 |
| 2415 | Beijing_1954_3_Degree_GK_Zone_39 | 115.5 | 118.5 | 117 | 加代号 |
| 2416 | Beijing_1954_3_Degree_GK_Zone_40 | 118.5 | 121.5 | 120 | 加代号 |
| 2417 | Beijing_1954_3_Degree_GK_Zone_41 | 121.5 | 124.5 | 123 | 加代号 |
| 2418 | Beijing_1954_3_Degree_GK_Zone_42 | 124.5 | 127.5 | 126 | 加代号 |
| 2419 | Beijing_1954_3_Degree_GK_Zone_43 | 127.5 | 130.5 | 129 | 加代号 |
| 2420 | Beijing_1954_3_Degree_GK_Zone_44 | 130.5 | 133.5 | 132 | 加代号 |
| 2421 | Beijing_1954_3_Degree_GK_Zone_45 | 133.5 | 136.5 | 135 | 加代号 |
| 2422 | Beijing_1954_3_Degree_GK_CM_75E | 73.5 | 76.5 | 75 | |
| 2423 | Beijing_1954_3_Degree_GK_CM_78E | 76.5 | 79.5 | 78 | |
| 2424 | Beijing_1954_3_Degree_GK_CM_81E | 79.5 | 82.5 | 81 | |
| 2425 | Beijing_1954_3_Degree_GK_CM_84E | 82.5 | 85.5 | 84 | |
| 2426 | Beijing_1954_3_Degree_GK_CM_87E | 85.5 | 88.5 | 87 | |
| 2427 | Beijing_1954_3_Degree_GK_CM_90E | 88.5 | 91.5 | 90 | |
| 2428 | Beijing_1954_3_Degree_GK_CM_93E | 91.5 | 94.5 | 93 | |
| 2429 | Beijing_1954_3_Degree_GK_CM_96E | 94.5 | 97.5 | 96 | |
| 2430 | Beijing_1954_3_Degree_GK_CM_99E | 97.5 | 100.5 | 99 | |
| 2431 | Beijing_1954_3_Degree_GK_CM_102E | 100.5 | 103.5 | 102 | |
| 2432 | Beijing_1954_3_Degree_GK_CM_105E | 103.5 | 106.5 | 105 | |
| 2433 | Beijing_1954_3_Degree_GK_CM_108E | 106.5 | 109.5 | 108 | |
| 2434 | Beijing_1954_3_Degree_GK_CM_111E | 109.5 | 112.5 | 111 | |
| 2435 | Beijing_1954_3_Degree_GK_CM_114E | 112.5 | 115.5 | 114 | |
| 2436 | Beijing_1954_3_Degree_GK_CM_117E | 115.5 | 118.5 | 117 | |
| 2437 | Beijing_1954_3_Degree_GK_CM_120E | 118.5 | 124.5 | 120 | |
| 2438 | Beijing_1954_3_Degree_GK_CM_123E | 121.5 | 121.5 | 123 | |
| 2439 | Beijing_1954_3_Degree_GK_CM_126E | 124.5 | 127.5 | 126 | |
| 2440 | Beijing_1954_3_Degree_GK_CM_129E | 127.5 | 130.5 | 129 | |
| 2441 | Beijing_1954_3_Degree_GK_CM_132E | 130.5 | 133.5 | 132 | |
| 2442 | Beijing_1954_3_Degree_GK_CM_135E | 133.5 | 136.5 | 135 | |
| 2349 | Xian_1980_3_Degree_GK_Zone_25 | 73.5 | 76.5 | 75 | 加代号 |
| 2350 | Xian_1980_3_Degree_GK_Zone_26 | 76.5 | 79.5 | 78 | 加代号 |
| 2351 | Xian_1980_3_Degree_GK_Zone_27 | 79.5 | 82.5 | 81 | 加代号 |
| 2352 | Xian_1980_3_Degree_GK_Zone_28 | 82.5 | 85.5 | 84 | 加代号 |
| 2353 | Xian_1980_3_Degree_GK_Zone_29 | 85.5 | 88.5 | 87 | 加代号 |
| 2354 | Xian_1980_3_Degree_GK_Zone_30 | 88.5 | 91.5 | 90 | 加代号 |
| 2355 | Xian_1980_3_Degree_GK_Zone_31 | 91.5 | 94.5 | 93 | 加代号 |
| 2356 | Xian_1980_3_Degree_GK_Zone_32 | 94.5 | 97.5 | 96 | 加代号 |
| 2357 | Xian_1980_3_Degree_GK_Zone_33 | 97.5 | 100.5 | 99 | 加代号 |
| 2358 | Xian_1980_3_Degree_GK_Zone_34 | 100.5 | 103.5 | 102 | 加代号 |
| 2359 | Xian_1980_3_Degree_GK_Zone_35 | 103.5 | 106.5 | 105 | 加代号 |
| 2360 | Xian_1980_3_Degree_GK_Zone_36 | 106.5 | 109.5 | 108 | 加代号 |
| 2361 | Xian_1980_3_Degree_GK_Zone_37 | 109.5 | 112.5 | 111 | 加代号 |
| 2362 | Xian_1980_3_Degree_GK_Zone_38 | 112.5 | 115.5 | 114 | 加代号 |
| 2363 | Xian_1980_3_Degree_GK_Zone_39 | 115.5 | 118.5 | 117 | 加代号 |
| 2364 | Xian_1980_3_Degree_GK_Zone_40 | 118.5 | 121.5 | 120 | 加代号 |
| 2365 | Xian_1980_3_Degree_GK_Zone_41 | 121.5 | 124.5 | 123 | 加代号 |
| 2366 | Xian_1980_3_Degree_GK_Zone_42 | 124.5 | 127.5 | 126 | 加代号 |
| 2367 | Xian_1980_3_Degree_GK_Zone_43 | 127.5 | 130.5 | 129 | 加代号 |
| 2368 | Xian_1980_3_Degree_GK_Zone_44 | 130.5 | 133.5 | 132 | 加代号 |
| 2369 | Xian_1980_3_Degree_GK_Zone_45 | 133.5 | 136.5 | 135 | 加代号 |
| 2370 | Xian_1980_3_Degree_GK_CM_75E | 73.5 | 76.5 | 75 | |
| 2371 | Xian_1980_3_Degree_GK_CM_78E | 76.5 | 79.5 | 78 | |
| 2372 | Xian_1980_3_Degree_GK_CM_81E | 79.5 | 82.5 | 81 | |
| 2373 | Xian_1980_3_Degree_GK_CM_84E | 82.5 | 85.5 | 84 | |
| 2374 | Xian_1980_3_Degree_GK_CM_87E | 85.5 | 88.5 | 87 | |
| 2375 | Xian_1980_3_Degree_GK_CM_90E | 88.5 | 91.5 | 90 | |
| 2376 | Xian_1980_3_Degree_GK_CM_93E | 91.5 | 94.5 | 93 | |
| 2377 | Xian_1980_3_Degree_GK_CM_96E | 94.5 | 97.5 | 96 | |
| 2378 | Xian_1980_3_Degree_GK_CM_99E | 97.5 | 100.5 | 99 | |
| 2379 | Xian_1980_3_Degree_GK_CM_102E | 100.5 | 103.5 | 102 | |
| 2380 | Xian_1980_3_Degree_GK_CM_105E | 103.5 | 106.5 | 105 | |
| 2381 | Xian_1980_3_Degree_GK_CM_108E | 106.5 | 109.5 | 108 | |
| 2382 | Xian_1980_3_Degree_GK_CM_111E | 109.5 | 112.5 | 111 | |
| 2383 | Xian_1980_3_Degree_GK_CM_114E | 112.5 | 115.5 | 114 | |
| 2384 | Xian_1980_3_Degree_GK_CM_117E | 115.5 | 118.5 | 117 | |
| 2385 | Xian_1980_3_Degree_GK_CM_120E | 118.5 | 121.5 | 120 | |
| 2386 | Xian_1980_3_Degree_GK_CM_123E | 121.5 | 124.5 | 123 | |
| 2387 | Xian_1980_3_Degree_GK_CM_126E | 124.5 | 127.5 | 126 | |
| 2388 | Xian_1980_3_Degree_GK_CM_129E | 127.5 | 130.5 | 129 | |
| 2389 | Xian_1980_3_Degree_GK_CM_132E | 130.5 | 133.5 | 132 | |
| 2390 | Xian_1980_3_Degree_GK_CM_135E | 133.5 | 136.5 | 135 |
