Web Mercator a.k.a WGS 84 / Pseudo-Mercator -- Spherical Mercator, is a projected coordinate system used for rendering web maps in applications like Google Maps and OpenStreetMap. The area of use is limited to World maps between 85.06°S and 85.06°N.

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ST_Distance Webmercator Error

I do have one more question pertaining to ST_Distance. I tried to add to my previous post but I made a new post. When applying the following query to my javascript I get this error: SELECT c....
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1answer
88 views

How to georeference a tile downloaded from Google Maps

I'm trying to georeference a set of image tiles downloaded from a Google Maps site. Based only on each image's Google Maps grid reference and zoom level, how can I calculate the real-world coordinates?...
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Are with WebMercator the X and Y extents identical?

I am calculating the tile coordinates in a WebMercator projection at different zoom levels and have the following problem: Cartopy suggests that the projection extent in meters is slightly different ...
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137 views

Arcmap: transform an image from Web Mercator Projection to Simple Cylindrical (Plate Carree) projection

I have an image that is projected using the Web Mercator projection. Does anybody know how to transform (in Arcmap) this image from the Web Mercator projection to the Simple Cylindrical (Plate Carree) ...
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231 views

Google Map Projection Skew - Need correct Projection

I'm having a really difficult time resolving skewed grids when projecting onto Google maps using Alteryx outputs. Within the module, I'm taking GRD files and aggregating rows and columns to re-size ...
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What shows the Tissot's indicatrix on a mercator projection?

While reading this post on Quora: https://www.quora.com/Why-does-Google-use-the-Mercator-projection-on-their-maps-as-opposed-to-an-equal-area-proportion-map, I understand that with a mercator ...
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43 views

Transform projection with SharpMap

I have SharpMap loading a shapefile and displaying the rendered image to a PictureBox. If I open the shapefile in QGis I can see the SRC: +proj=merc +lon_0=100 +lat_ts=-41 +x_0=0 +y_0=0 +datum=...
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Transform itrf96 to web mercator 900913 proj4s

I am using cached basemap tiles with itrf96. proj4 version is like this: Spatial Reference Page +proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs I want to ...
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313 views

Reprojecting from Lambert Conformal Conic into EPSG:3857?

I'm trying to reproject a plain png image file into EPSG:3857 for use in an OpenLayers application. I'm pulling the image from the NWS site at: http://rapidrefresh.noaa.gov/HRRR/for_web/hrrr_ncep_jet/...
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114 views

Digitizing with OpenLayers Plugin seems incorrect

I am attempting to digitize some buildings based on floor plans using QGIS. To do this, I have taken the blueprints, georeferenced them against openlayers bing aerial plugin. I then digitized the ...