Relative to WGS 84 / World Mercator (CRS code 3395) errors of 0.7 percent in scale and differences in northing of up to 43km in the map (equivalent to 21km on the ground) may arise. The value 85.051129° is the latitude at which the full projected map becomes a square, and is computed as The projection is neither strictly ellipsoidal nor strictly spherical. I have generate a variable distance buffer that I want to be circles around point on a Google Street Map of a city.When I set the the CRS as 'EPSG:4326, WS 84' the circles appear as ovals: By using our site, you acknowledge that you have read and understand our Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. 最近地図の view では、epsg:3857 がデファクトスタンダードになっている 平面地図上の地点を北に何メートル、東に何メートルで表す; 平面の地図描画するには epsg:3857 は確かに扱いやすい; 一方でデータは epsg:4326 (＝wgs84 ≒jgd2000) が主流 The best answers are voted up and rise to the top This is a CRS popularly used for web mapping and is a decent choice for our purpose, so we can leave it to its defalt value. Please rely on the bar scale on each map sheet for map measurements. This is not a limitation for street maps, which is the primary purpose for such services. Based on transforming (180,0), it seems that this epsg:3857 coordinate system is centered at the equator and scales by meters at the equator, using a circumference of the earth of 40075016.68557849m. Powered by EPSG database 9.8 Our view is set to EPSG:3857 (most of our layers are) and the other layer apparently redirects to EPSG:4326. Right now I'm applying the projection to use EPSG:28992.
Uses spherical development of ellipsoidal coordinates.
Featured on Meta The default CRS for the project is set to EPSG:3857 Pseudo-Mercator. Thank you! Go to Project ‣ … This is confusing, given the the Google maps layer's CRS is 'EPSG:3857 Pseudo Mercator'! Es gibt ein paar Dinge, die Sie verwechseln. When I set the the CRS as 'EPSG:4326, WS 84' the circles appear as ovals: When I set the CRS as 'EPSG:3857 Pseudo Mercator', while the shapes are the correct shape, they will not appear with the base map, and the base map is nowhere to be found. EPSG:3857 Projected coordinate system for World between 85.06°S and 85.06°N.
Services such as Google Maps cut off coverage at 85.051129° north and south. What this means is that angles between lines on the surface will not, in general, be mapped to exactly the same angles. Based on transforming (180,0), it seems that this epsg:3857 coordinate system is centered at the equator and scales by meters at the equator, using a circumference of the earth of 40075016.68557849m. EPSG:3857 Projected coordinate system for World between 85.06°S and 85.06°N. Is there some way to 'interject' at the projection level of the layer (when defining the 'projection' from the source) to make it use EPSG:3857 instead of EPSG:4326? Discuss the workings and policies of this site
Start here for a quick overview of the site Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. It rose to prominence when Google Maps adopted it in 2005. Even so, they will not deviate enough to be noticeable by eye. This is standard practice on the standard spherical Mercator projection, as well, but unlike Web Mercator, the spherical Mercator is not normally used for maps of local areas, such as street maps, and so the accuracy of positions needed for plotting is typically less than the angular deviation caused by using spherical formulas. @Joseph I tried this out, and it worked. Geographic Information Systems Stack Exchange works best with JavaScript enabled (EPSG: 4326) Google Maps is in a projected coordinate system, das auf dem Datum is in a projected coordinate system basiert.