Hi Uwe, Classifying plugins under Tools menu is really a hard job and some inconsistencies may come from a lack of coordination among developpers. I'll try to help with my limited knowledge of those functions
>1. What is the different between Tools>Analysis and Tools>Queries? > > I think queries never modify features, only select some of them. >2. Buffer is (one time) under Tools>Generate but Union (one Layer) is >under Tools>Analysis? > > IMHO, this is not very consistent >3. Is there a reason why we have different notations (for example): >Source, source layer, Layer A, Layer, Source Layer? > > I saw that where A and B are used, they are referred in the explanation panel "select A.*, B.*..." which may be the reason. There may be some situations where layers have symmetric roles (like overlays), and others where a layer has a special role (source, target, reference), like attribute transfer. >4. What is "Simplify D - P"? > > Simplify Douglas Peucker : a simplification algorithm (Stefan can surely explain that better than I) >5. What is "Simplify (preserve topology)"? > > Simplify (preserve topology), applied to a network, preserve connections between linestrings (maybe Simplify D-P don't, I did not try). Sadly, topology is not preserved for a planar graph represented as polygons touching each others >6. Thank you for your help! > > > >1 = Tools>Analysis>Geometry Functions (Source, Function, Parameter, Mask) >2 = Tools>Analysis>Join Attributes Spatially (target layer, source >layer, ...) >3 = Tools>Analysis>Overlay >4 = Tools>Analysis>Spatial Join of Geometries (Layer A, Relation, >Parameter, Layer B) >5 = Tools>Analysis>Union >6 = Tools>Analysis>Union by Attribute Value >7 = Tools>Generate>Buffer >8 = Tools>Generate>Convex Hull >9 = Tools>Generate>Convex Hull on Layer >10 = Tools>Generate>Create Thiessen Polygons >11 = Tools>Queries>Simple Query (Layer, Operator, Value) >12 = Tools>Queries>Spatial Query (Source Layer, Relation, Mask Layer, >Parameter) > > > Hey, seems there is a lot of redundancy :-( It will be hard to clean up as many functions are close to each others, but not strictly the same. May be a solution could be to propose some of them for removal (or to be packaged in a special extension) and vote. Anyway, you did an excellent job, and I'll try to spend a little more time to see the difference between all those function and to tell which one are better for me. Regards Michael >Boundary 1 >Buffer 1, 7 : first can >Centroid of Source 1 >Contains 2, 4, 11, 12 >Convex Hull 1, 8, 9 >Covers 4, 12 >Crosses 4, 11, 12 >Difference A -- B 1 >Difference B -- A 1 >Disjoint 4, 12 >Envelope 1 >Equals 4, 12 >Is Covered by 2, 4, 12 >Is Disjoint 11 >Is Includet in 11 >Is Within Distance 4, 11, 12 >Interior Point 1 >Intersects 1, 2, 3, 4, 11, 12 >Line Merge 1 >Line Sequence 1 >Overlaps 4, 11, 12 >Polygonize 1 >Reverse Line Direction 1 >Simplify D -- P 1 >Simplify (preserve topology) 1 >Similar 4, 12 >Symmetric Difference 1 >Thiessen Polygon 10 >Touches 4, 11, 12 >Union with one Layer 5 >Union with two Layers 1 >Within 4, 12 > > > >Regards, > >Uwe > > >------------------------------------------------------------------------- >This SF.net email is sponsored by: Splunk Inc. >Still grepping through log files to find problems? Stop. >Now Search log events and configuration files using AJAX and a browser. >Download your FREE copy of Splunk now >> http://get.splunk.com/ >_______________________________________________ >Jump-pilot-devel mailing list >Jump-pilot-devel@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
