Hatching Issues with Polylines

[JohnC_ISM]

when trying to hatch things such as parking lots, roads, or anything else that has curves no matter how much i check to make sure the boundary is closed it says unable to hatch and theirs a gap. makes it super difficult because i have to redraw the whole road with one single polyline. even when i decurve the polyline it still gives me the error. 

im not sure if theres something im doing wrong or the settings. 

autocad 09 land desktop

[pendean]

Select the PLINE(s) in question.
start PROPERTIES command.
At the very bottom/second to last entry, answer YES to close the pline.

Does that software your problem?

[JohnC_ISM]

no because they arent alway connected. since were using GPS points some stuff cant be drawn and connected to the same like ie ends of curbs, change in concrete or asphalt. so this is what happens when it goes from normal ( pic 1) to closed (pic 2)

[ChicagoLooper]

OK. Understood. It sounds like your curb and asphalt are at different elevations. For example, the road surface is 100'-0" above mean sea level and your top of curb is 100'-6" above sea level.

In cases such as this you'll need a closed polygon for the road surface and another closed polygon for the road surface. You need to separate the surfaces because each surface is at their own elevation, one being 6" higher than the other.

Think about it. If the surfaces have a 6" elevation difference how do you hatch the transition from road surface to top-of-curb? The transition, that surface, is the face of the curb and the face is a completely different polygon, not the top of curb and not the road surface. The curb's face isn't even visible from plan view.

The only alternative is to FLATTEN all your lines so they reside at say, 0'-0" above sea level, and I don't think you want to do that. Do you?

[JohnC_ISM]

yes that makes sense. i get that. 

i did the FLATTEN and checked all endpoints to make sure they are all on snaps and this is what i get (hatch pic)

and if i click the spots that arent highlighted it tries to hatch the entire drawing. even though i just checked it. 

[JohnC_ISM]

i just checked what lines they were and it seems to be an argument between polyline and 2d polyline, when i convert curves into curves (PLINE -> FIT).   im not sure if thats a factor or not. even tho they are on the same elevation

[ChicagoLooper]

Awwww, no. You stated you were using GPS points. That tells me you’re dealing with x,y,z data collected by a work crew in the field using hand-helds. By flattening the points you have taken the technology out of your data, you removed the elevation data. The elevation is there for a reason, a design reason or an analytical reason.  

Just because you can flatten doesn’t mean you should. 

[JohnC_ISM]

i understand what you mean but i drew the lines and then isolated the concrete layer i drew in then flattened, i did not flatten the points at the same time.