Patent ID: 9471959
Filing Date: 2016-10-18
CPC Classification: G06T,G09G

Claim Text:
1. A method in a network device for generating a description of a raster map image that includes a representation of a body of water having a color gradient that appears constant in response to a zoom operation, the method comprising: generating a description of geometry of the body of water, for a selected geographic area; using a raster representation of the body of water having a color gradient, generating (i) a first blur raster image using a first blur radius and (ii) a second blur raster image using a second blur radius different from the first blur radius; and providing the description of the geometry of the body of water, the first blur raster image, and the second blur raster image to a client device via a communication network, for generating raster map images of the selected geographic area, wherein the description of the geometry, the first blur raster image, and the second blur raster image, when combined, generate a representation of coastline water having a darker color than non-coastline water, and wherein a width in pixels of the representation of the coastline water remains constant at multiple zoom levels.