Bug rendering Text symbol.

DanielRojas — Thu, 20 Oct 2011 15:39:03 GMT

Hi,
I am working in an application that have to label some polygons. I was wondering why some of the labels was not showing, until after tracing the bug I found that for the specific polygons where the label was not rendered the labelPointForPolygon function of the AGSGeometryEngine return a point with a valid X but with a Y totally outside of the world boundaries. I think that maybe the issue is related with the projection that I am using, some how. There is the code that reproduce the bug:

NSString* wtkNAN83HARNWashintongNort = [NSString stringWithString:@"PROJCS[""NAD_1983_HARN_StatePlane_Washington_North_FIPS_4601_Feet"",GEOGCS[""GCS_North_American_1983_HARN"",DATUM[""D_North_American_1983_HARN"",SPHEROID[""GRS_1980"",6378137.0,298.257222101]],PRIMEM[""Greenwich"",0.0],UNIT[""Degree"",0.0174532925199433]],PROJECTION[""Lambert_Conformal_Conic""],PARAMETER[""False_Easting"",1640416.666666667],PARAMETER[""False_Northing"",0.0],PARAMETER[""Central_Meridian"",-120.8333333333333],PARAMETER[""Standard_Parallel_1"",47.5],PARAMETER[""Standard_Parallel_2"",48.73333333333333],PARAMETER[""Latitude_Of_Origin"",47.0],UNIT[""Foot_US"",0.3048006096012192]]"];
    AGSSpatialReference* originalProjection = [AGSSpatialReference spatialReferenceWithWKT:wtkNAN83HARNWashintongNort];
    AGSGeometryEngine * geoEngine = [AGSGeometryEngine defaultGeometryEngine];
    
    AGSMutablePolygon* polygone = [[AGSMutablePolygon alloc] initWithSpatialReference:originalProjection];
    [polygone addRingToPolygon];
    [polygone addPointToRing:[AGSPoint pointWithX:1301118.94 y:191402.517 spatialReference:nil]];
    [polygone addPointToRing:[AGSPoint pointWithX:1301118.94 y:191415.36 spatialReference:nil]];
    [polygone addPointToRing:[AGSPoint pointWithX:1301131.732 y:191415.365 spatialReference:nil]];
    [polygone addPointToRing:[AGSPoint pointWithX:1301131.732 y:191402.517 spatialReference:nil]];
    [polygone addPointToRing:[AGSPoint pointWithX:1301118.94 y:191402.517 spatialReference:nil]];
    
    AGSPoint* pointForLabel = [geoEngine labelPointForPolygon:polygone];
    NSLog(@"Point for label X: %f", pointForLabel.x); // the x is a nomal value between 1301118.94 and 1301131.732 
    NSLog(@"Point for label Y: %f", pointForLabel.y); // the y is a very wrong. it like 8888888889898888888888888888888888888888888 that is the bug....
    
    // user a symbol like this to you can see the in the map that the polygon is visible but the text is not.
    AGSCompositeSymbol* myMarkerPolySymbol = [[AGSCompositeSymbol alloc] init];
    AGSTextSymbol* textSymbol = [AGSTextSymbol textSymbolWithTextTemplate:@"this text don't appear" color:[UIColor redColor]];
    AGSSimpleFillSymbol* fill = [AGSSimpleFillSymbol simpleFillSymbol];
    fill.color = [UIColor colorWithRed:0.8 green:0.3 blue:0.3 alpha:0.2];
    fill.outline.color = [UIColor redColor];
    fill.style = AGSSimpleFillSymbolStyleBackwardDiagonal;
    [myMarkerPolySymbol.symbols addObject:fill];
    [myMarkerPolySymbol.symbols addObject:textSymbol];

// if copy this code please note that I don't add the release for any of the alloc's and I am not adding (in this code) the polygon to any graphic layer, just using the NSLog to see the values.

Re: Bug rendering Text symbol.

PaulLohr — Thu, 20 Oct 2011 18:32:03 GMT

I wonder if an error message would be returned if wtkNAN83HARNWashintongNort was not created properly...?

The first layer that gets added to your map, does it match the wtkNAN83HARNWashintongNort projection? If not you might try making sure they match just as a test.

Re: Bug rendering Text symbol.

NimeshJarecha — Thu, 20 Oct 2011 22:02:11 GMT

Daniel,

Thank you for reporting. We'll look into it.

Regards,
Nimesh

Re: Bug rendering Text symbol.

DanielRojas — Fri, 21 Oct 2011 03:38:10 GMT

Yes it match the same projection. I am using this projection for all the layers, and actually I have a big list of polygons, that are very similar (that are all over the map) that show the label correctly. Was just some polygons, like the one I add here as test, that show this behavior.

I wonder if an error message would be returned if wtkNAN83HARNWashintongNort was not created properly...?

The first layer that gets added to your map, does it match the wtkNAN83HARNWashintongNort projection? If not you might try making sure they match just as a test.

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