Fuzzy lines when rendering shape

[Kevin6]

Hi,

I’m loading a shape file which is in the North_America_Lambert_Conformal_Conic CRS (EPSG:1002009) and the lines are not straight and it seems a bit fuzzy. By. I set the projection on the shape layer to the proj4 string +proj=lcc +lat_1=20 +lat_2=60 +lat_0=40 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs which I am getting from QGIS for that particular CRS. It loads fine but looks a lot less smooth than when I load the same file using that CRS in QGIS. Any idea why the ThinkGeo shape layer looks like this?

ThinkGeo:

QGIS:

I’ve attached a zip file with the shape file and associated files. This shape file is already in the correct projection.

Any help would be greatly appreciated. Thanks!

Best,

Kevintest.zip (336.3 KB)

[Peter]

Hi Kevin,

Usually we can change the DrawingQuality property of overlay to get the high quality. But I changed this property and still can’t get the same experience as QGIS, but a bit better than default. I compared the result with Global Mapper, TatukGIS and other tools, all of them got the same result as ours(WPF Desktop Edition), but when I zoom in to same extent and I found that we get the same result as QGIS. So I guess maybe the QGIS handles the data during the rendering process.

Following is the screenshot shows the result between WPF Edition and QGIS at some zoom level.

Thanks,
Peter

[Kevin6]

HI Peter,

Thanks for the explanation. I changed the DrawingQuality and that improved things.

Best,

Kevin

[Peter]

Hi Kevin,

Very glad to hear it’s helpful.

Thanks,
Peter