I have some bunch of points in an area and I want to draw connecting lines with the help of points to create a closed polygon. But all these needs manual efforts. Can any one explain to me how to create polygon automatically in QGIS with the help of outermost points.
120837
I want to know if there is a plugin in QGIS, which will allow me to draw the outline a point cloud. I know there Points2One the plugin, but it makes an outline with all points, even with the data found in the middle of the point cloud.  I give you an example ;  x       y       ID      order 3.3     43.2625 353293  1 3.13334 43.3458 353293  2 3.21667 43.3458 353293  3 2.88334 43.4292 353293  4 2.96667 43.4292 353293  5 3.05    43.4292 353293  6 3.13334 43.4292 353293  7 2.71667 43.5125 353293  8 2.8     43.5125 353293  9 2.88334 43.5125 353293  10 2.96667 43.5125 353293  11 3.05    43.5125 353293  12 3.13334 43.5125 353293  13 2.88334 43.5958 353293  14 2.96667 43.5958 353293  15 3.05    43.5958 353293  16 3.13334 43.5958 353293  17 2.96667 43.6792 353293  18 3.05    43.6792 353293  19 3.13334 43.6792 353293  20 3.21667 43.6792 353293  21 3.05    43.7625 353293  22 3.13334 43.7625 353293  23 3.21667 43.7625 353293  24 3.13334 43.8458 353293  25 3.21667 43.8458 353293  26   With the tool suggested by @ArMoraer I can only draw a polygon with the outer points that are more extreme. The polygon has touched just 5 points (see map of Convex hull below) but normally it should pass on 20 points (all points of the contour).     Each point has a pixel, actually the outline should not touch the points but it must pass through the outer limit of these pixels. In the end I want to have an outline like this map (see map below : desired contour)
41338
I am digitising line-features based on WGS-84 point-coordinates from a PDF which cannot be copied from.  The final line layer should contain lines which each connect two points and have the following attributes:   Name of start point - name of end point value in [ft] value in [m] remark (same for all features) date of creation   Currently I have a csv-based point layer which simply contains the name and coordinates of each point.    Creating the point layer is no problem, but creating the lines is a bit of a hassle. Either I manually create a .csv containing all existing connections between points like the following table and run connect by lines:    Or I digitise the lines manually but fill in the values (except for the value in [ft]) automatically.    Personally I would prefer option 2, since option 1 involves more manual work and the process has to be repeated regularly (and I figure I could transfer the solution to other tasks), but I can't get the expression right which should fill in the name of the line. All other values are created flawlessly (though they are not taken from another layer based on geometry).  I added the WKT of each point to the point-layer. Currently I am running the following, which returns NULL, despite it seems to be correct to me:  attribute(get_feature('point-layer','geom',geom_to_wkt(start_point($geometry))),'Waypoint')||' - '||attribute(get_feature('point-layer','geom',geom_to_wkt(end_point($geometry))),'Waypoint')   Any ideas where I went wrong?
70756
I have a situation like this:     What I need to do is to connect each point to every line that is at most, let's say 200 m, away from the point. In other words, I need to draw a perpendicular line from each point to every line that is in the buffer.  Is there a way to do this in PyQGIS?
95917
I added the new vector layer in QGIS and I want to draw a circle of 500M or 1000M from center.  I also added the pluginn Rectangles ovals digitizing in QGIS. But the options of this pluginn is not active.   How do I use this plugin?
95378
I have two layers, a line and a point layer.  I need to make a line layer which connects all the points to the nearest line feature. How can I do that?  Is there a plugin available for QGIS? This is a very important tool which is missing in QGIS.  ArcView has this tool:
61798
I am trying to split a selected polygon ("regions") with a selected line from another layer ("streets") in QGIS 3.8.3. In the example below, I want to split the selected polygon coloured in yellow with the street pointed at by the blue arrow.    After reading the post , I realized I can't find it either. I installed the plugin, but the tool seems to be missing from my toolbar:
121701
I'm a beginner QGIS user and am struggling with creating a grid. I've used the MMQGIS geometry import function to import data from the CSV file shown below but they pop up as points on QGIS. I want to make it into a grid so that I can pretty much have each of the points be in a box format. I've also tried to use the join function but am not sure what variable both the grid and the points have so that I can join them.
76214
I spent days looking in all questions here and trying tutorials. I need to build a graph for a region (It will be my input in simulation) I downloaded Postgresql and Postgis and osm2pgsql. Now i can load .osm files into a database. I want to have a complete database with roads ids so i can generate a table of edges and nodes then build my graph  nodes = intersections and edges = roads for a city using python.  Please any detailed help with steps.I saw a lot of keywords (Postgresql/postgis, Networkx, QGIS ..) but i couldn't manage to assemble a good tutorial  I am a very beginner.
121882
Do you know of a way to take surveyor's calls from an excel file (for example: N35-45-15W 60.0 ft, etc) and have them generate polygon shapefiles point by point in GIS? I know you can easily do this with point features that have coordinates, but I am trying to figure out how to build full polygons (without XY coordinate information, just surveyor's calls).
99536
I have a map made up of multiple polygons, with a few hundred thousand points very small polygons on within it.  I need the larger polygons, but not the points small polygons.  How do I select and remove all the points small polygons, while preserving the larger polygons?  (I obviously do not want to do this manually - there are a few too many points for that!)  I'm totally new to QGIS, and I've Googled extensivey with no luck.  Probably because I'm unsure what the correct terminology to use in a Google search is!  The files I am using are a .dbf, .prj, .qpj, .shp and .shx.  I'm simply dragging the .shp file on to QGIS, and the map appears as one layer.  Basically a map of the UK divided into regions (which I want) and covered in points (which do not want).     This is what it looks like up close.  I did a dissolve to see if they'd go in to the surrounding layer, with no luck:
6907
I want to convert polygons into points using QGIS.   I know how it's done in ArcGIS Desktop.
119692
I want to draw an arbitrary closed surface like following figure. How can i do it?   Here is the MWE:  \documentclass{article} \usepackage{tikz} \begin{document} \begin{tikzpicture} \shade[line width=2pt, color=blue] (0, 0) .. controls(1,2) .. (3, 0) ; \end{tikzpicture} \end{document}   In my code, color option doesn't work and I can't close the \controls.
123455
I'm trying to reproduce the steps needed to aim this goal: Given a layer of polygons, I'm want to retrieve for each polygon which is at a distance less than 50m to a 2nd polygonal layer the only 5m band in the polygon facing the items of the second layer. Quite complicated explanations...I know....so, a drawing is a better way to explain myself. I want to build the red parts (the 5m band of the orange layer polygons facing the green ones, when they're at a distance less than 50m)....How would you do that with QGIS?
32200
I have a shapefile containing contour for a large area, and I want to split it into different shapefiles each covering a 1KM X 1KM area. I have already created the required Grid shapefile in QGIS.  How do I now split the contours using the created Grid?  I am searching for something equivalent to the  in ArcGIS.
60531
Lots of questions about turning metes and bounds into a polygon, but how about going in reverse? Are there any existing tools or do I need to look at building a script myself?  Ultimately I'd like to generate points with x/y and at all the vertices and line segments with distance and direction as attributes (so I can label them).   This for submission to our local government as part of their legal requirements.
56006
I have a table with three points in it and I want to create a line from them using PostGIS.    when I try to create a line from this geometry using:  select id,         st_makeline(geom order by id desc) as geom  from public."point_table" group by id;   I get null geometery    What am I doing incorrectly?  PostGIS version 2.2.1 PostgreSQL version 9.5.1
25837
I have a layer of street segments that are within a given distance of a fire station. Now I want to make a border around these street segments. If I use Buffer, it puts a buffer around each segment. If I use Convex Hull it makes a border around the street segments but does not follow the street segments but rather cuts across them. What I really need is an outside buffer of the street segments that follows the outermost street segments.   Is it possible in QGIS?  The image below shows the problem. The lines in green represent street segments that can be reached from a given point within 4 minutes. The yellow is 6 minutes and the blue is 8 minutes from the same point.  When I put a convex hull around the green segments (shown in purple), the hull includes some of the yellow segments because a convex hull is based on the smallest polygon that contains all of the lines. I see that a concave hull is what I really need, but QGIS does not support the concave hull.