/// <summary>
/// Returns true if the given tags collection contains tags that could represents an area.
/// </summary>
/// <param name="tags"></param>
/// <returns></returns>
public override bool IsPotentiallyArea(TagsCollection tags)
{
if (tags == null || tags.Count == 0)
{
return(false);
} // no tags, assume no area.
bool isArea = false;
if ((tags.ContainsKey("building") && !tags.IsFalse("building")) ||
(tags.ContainsKey("landuse") && !tags.IsFalse("landuse")) ||
(tags.ContainsKey("amenity") && !tags.IsFalse("amenity")) ||
(tags.ContainsKey("harbour") && !tags.IsFalse("harbour")) ||
(tags.ContainsKey("historic") && !tags.IsFalse("historic")) ||
(tags.ContainsKey("leisure") && !tags.IsFalse("leisure")) ||
(tags.ContainsKey("man_made") && !tags.IsFalse("man_made")) ||
(tags.ContainsKey("military") && !tags.IsFalse("military")) ||
(tags.ContainsKey("natural") && !tags.IsFalse("natural")) ||
(tags.ContainsKey("office") && !tags.IsFalse("office")) ||
(tags.ContainsKey("place") && !tags.IsFalse("place")) ||
(tags.ContainsKey("power") && !tags.IsFalse("power")) ||
(tags.ContainsKey("public_transport") && !tags.IsFalse("public_transport")) ||
(tags.ContainsKey("shop") && !tags.IsFalse("shop")) ||
(tags.ContainsKey("sport") && !tags.IsFalse("sport")) ||
(tags.ContainsKey("tourism") && !tags.IsFalse("tourism")) ||
(tags.ContainsKey("waterway") && !tags.IsFalse("waterway")) ||
(tags.ContainsKey("wetland") && !tags.IsFalse("wetland")) ||
(tags.ContainsKey("water") && !tags.IsFalse("water")) ||
(tags.ContainsKey("aeroway") && !tags.IsFalse("aeroway")))
{ // these tags usually indicate an area.
isArea = true;
}
string typeValue;
if (tags.TryGetValue("type", out typeValue))
{ // there is a type in this relation.
if (typeValue == "multipolygon")
{ // this relation is a multipolygon.
isArea = true;
}
else if (typeValue == "boundary")
{ // this relation is a boundary.
isArea = true;
}
}
if (tags.IsTrue("area"))
{ // explicitly indicated that this is an area.
isArea = true;
}
else if (tags.IsFalse("area"))
{ // explicitly indicated that this is not an area.
isArea = false;
}
return(isArea);
}
public void TestBooleanParsing()
{
// test IsTrue.
TagsCollectionBase tags = new TagsCollection();
tags.Add("area", "yes");
Assert.IsTrue(tags.IsTrue("area"));
tags = new TagsCollection();
tags.Add("area", "1");
Assert.IsTrue(tags.IsTrue("area"));
tags = new TagsCollection();
tags.Add("area", "true");
Assert.IsTrue(tags.IsTrue("area"));
tags = new TagsCollection();
tags.Add("area", "false");
Assert.IsFalse(tags.IsTrue("area"));
tags = new TagsCollection();
tags.Add("area", "0");
Assert.IsFalse(tags.IsTrue("area"));
tags = new TagsCollection();
tags.Add("area", "no");
Assert.IsFalse(tags.IsTrue("area"));
// test IsFalse.
tags = new TagsCollection();
tags.Add("area", "yes");
Assert.IsFalse(tags.IsFalse("area"));
tags = new TagsCollection();
tags.Add("area", "1");
Assert.IsFalse(tags.IsFalse("area"));
tags = new TagsCollection();
tags.Add("area", "true");
Assert.IsFalse(tags.IsFalse("area"));
tags = new TagsCollection();
tags.Add("area", "false");
Assert.IsTrue(tags.IsFalse("area"));
tags = new TagsCollection();
tags.Add("area", "0");
Assert.IsTrue(tags.IsFalse("area"));
tags = new TagsCollection();
tags.Add("area", "no");
Assert.IsTrue(tags.IsFalse("area"));
}