TileStache.Goodies.Providers.Grid module¶

Grid rendering for TileStache.

UTM provider found here draws gridlines in tiles, in transparent images suitable for use as map overlays.

Example TileStache provider configuration:

“grid”: {

“provider”: {“class”: “TileStache.Goodies.Providers.Grid:UTM”,

“kwargs”: {“display”: “MGRS”, “spacing”: 200, “tick”: 10}}

}

class TileStache.Goodies.Providers.Grid.UTM(layer, display='UTM', spacing=128, tick=8)¶

UTM Grid provider, renders transparent gridlines.

Example configuration:

“grid”: {

“provider”: {“class”: “TileStache.Goodies.Providers.Grid.UTM”,

“kwargs”: {“display”: “MGRS”, “spacing”: 200, “tick”: 10}}

}

Additional arguments:

display (optional, default: “UTM”)

Label display style. UTM: “18Q 0780 2052”, MGRS: “18Q YF 80 52”.
spacing (optional, default: 128)

Minimum number of pixels between grid lines.
tick (optional, default 8)

Pixel length of 1/10 grid tick marks.

renderArea(width_, height_, srs, xmin_, ymin_, xmax_, ymax_, zoom)¶

TileStache.Goodies.Providers.Grid.lat2hemi(lat)¶: Convert latitude to single-letter hemisphere, “N” or “S”.

TileStache.Goodies.Providers.Grid.lat2zone(lat)¶: Convert longitude to single-letter UTM zone.

TileStache.Goodies.Providers.Grid.lon2zone(lon)¶: Convert longitude to numeric UTM zone, 1-60.

TileStache.Goodies.Providers.Grid.lonlat2grid(lon, lat)¶: Convert lat/lon pair to alphanumeric UTM zone.

TileStache.Goodies.Providers.Grid.transform(w, h, xmin, ymin, xmax, ymax)¶

TileStache.Goodies.Providers.Grid.utm2mgrs(e, n, grid, zeros=0)¶

Convert UTM easting/northing pair and grid zone to MGRS-style grid reference, e.g. “18Q YF 80 52”.