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    Improving performance of Clip using OGR?

    I have a set of points which I am trying to clip to a set of polygons. The files have many features (150,000 polys, 8,000 points). I'd like to automate this process carry it out once a day, hence I am using python/gdal/ogr to script the operation. However, it is prohibitively slow. Performing...
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    [QGIS 2.x] Erreurs d'écriture d'entités - erreur d'intersection

    Bonjour à tous, Après avoir fait quelques recherches en vain, je me décide à ouvrir un nouveau sujet suite à un problème dont je ne trouve pas la solution. Je dispose de deux couches de type polygone couvrant tout un territoire que je souhaiterais intersecter: une couche... أكثر...
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    qgis Automatically zoom to region of map where gps traces appear - TimeManager

    How would I accomplish in qgis automating of the production of multiple TimeManager recordings with a consistent orientation, zoom and framing of gps traces?. I expect it will involve python & postgis db queries but I've new to qgis and python so not sure where to start with setting...
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    QGIS Nautical Chart Symbols for sector lights

    This is I know going to be of limited interest to many of you but I teach navigation and I am working on producing test questions and charts for assessing learners knowledge. My problem is solvable with post editing but as I am finding QGIS very versatile as I am learning it I think there may be...
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    QGIS Polygons missing after saving edits

    Right, I am slightly worried. I opened QGIS this morning to discover that part of the work I did yesterday was not there (the attributes where present in the table, but were not digitised anywhere on the interface). I had assumed that I had accidentally done something last night before I went...
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    Connecting vertices to form a line without using an attribute

    I have a number of multipoint features that form lines (hiking trails). I would like to connect the dots of each multipoint feature to generate line features, but there are no attributes with which to sort the points in the correct order. The trails vary quite a bit in shape and direction so I...
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    Identifying clusters in vector point data using QGIS?

    I have a vector dataset of rural broadband data-points (how fast, etc.) and I'd like to explore if there are clusters of points with similar characteristics, and to plot polygons encompassing them. For example, I may have 45,000 points in a single PostGIS dataset distributed over a landscape...
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    Arcgis Web Adapator,Configure LDAP relam tomcat

    i am using arcgis server 10.2.1.trying to enable Web tier authentication to consume map service in asp.net application(LDAP authentication).Before this i am struck with following configuration From ESRi doc for LDAP authentication i need to deploy arcgis web adaptor on java application server (...
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    Destroy handle to featureclass

    I am creating a class to log geometries to shapefiles. So I create an instance of a GeometryLogger which holds a reference to a IFeatureClass. To write to the file I open an editsession once the featureclass has been created and opened. However I´m unsure when I should close the session. Is this...
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    How to create polyline feature through mouse picking in arcobjects (ArcMap VBA)

    I want to crate polyline feature using mouse picking points(first point and second point) through pick points coordinates in ArcMap VBA could you please tell how to take mouse pick points. Private Sub procesFeat()Dim pMxDoc As IMxDocumentDim pMap As IMapDim pEnmFeat As IEnumFeatureDim SVRFclass...
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    fixing multipolygons with "ring not closed" errors

    I have a shapefile with a single multipolygon feature. This feature has a "ring not closed" geometry error (seen here in QGIS): I tried using buffering and the GRASS v.clean command as suggested in other answers, but no luck. I also can't find the gap by inspecting the feature visually (it...
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    Trouble importing qgis.core python module

    I am having issues loading the qgis Python modules in the osgeo4w shell. Ultimately I want to work with the modules in pyscripter. I tried the solution mentioned in Problem with import qgis.core when writing a stand-alone PyQGIS script, by loading the sample my_pyqgis_script.py that was given...
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    Importing CAD to ArcGIS?

    I'm trying to import some CAD files from microstation (dgn) v7 to ArcGis 9.3.1 and i need to access the User Data Linkage from it but i have not the Data Interoperability License. Is there any alternative way to do this? أكثر...
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    Camino a gvSIG 2.3: Segmentaci

    Continuamos con las novedades en gvSIG 2.3 relacionadas con Segmentaci أكثر...
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    استفاده از تحل

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    اطلس جمع

    أكثر...
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    اطلس م

    <div><span class="Apple-style-span" style="color: rgb(53, 56, 61); font-family: tahoma, Arial, Helvetica, sans-serif; font-size: 12px; line-height: 15px; ">ل أكثر...
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    ژئومارکت

    <div> <span style="font-family: Tahoma; font-size: 9pt; ">برا أكثر...
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    اروپا

    <div><span class="Apple-style-span" style="color: rgb(37, 37, 37); font-family: Tahoma, 'Iranian Sans', 'DejaVu Sans', 'Noto Kufi Arabic', 'Droid Arabic Kufi', sans-serif; font-size: 14px; line-height: 22px; ">به أكثر...
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    لا

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