Questions tagged [polygon-creation]

Process of creating geometric polygon features.

Filter by
Sorted by
Tagged with
0
votes
1answer
45 views

Making polygons out of X,Y-point groups?

I have (X,Y)-coordinates for different places in a single file. How can I make polygons from a group of points separated by NULL? A common method 'Points to line' does not seem to work. For instance, ...
0
votes
0answers
38 views

Convex Hull not outputting expected number of features

I have a .csv file with observations of various species and I want a polygon to illustrate the area where those species occur. I ran the Convex Hull, grouped by the species' names field, which ...
1
vote
1answer
27 views

Creating triangles from points with a given bearing and leg length

I have a spreadsheet that contains ID, LAT_DD, LONG_DD, Bearing and LEN fields. I need to automate a way to create a triangle for every point identified in the table and I have no idea how. I know the ...
1
vote
0answers
21 views

Convert polygon co-ordinates to GeoJSON using JavaScript [closed]

I need to convert the below polygon to a GeoJSON object, "Polygon":"146.90805846452713 -42.942663073539734, 147.01517516374588 -42.87627762556076, 147.15525084733963 -42.745309352874756, 147....
0
votes
1answer
46 views

Generate concentric polygons using Turf

I'm interested in trying to reproduce this kind of cartography in a Mapbox/Turf/vector tile stack: I would start with the polygon for the lake edge, and generate a series of concentric polygons ...
0
votes
3answers
40 views

Copying polygon feature class with 405 features for each matching owner entity?

I have 425 polygon features that I need to duplicate in relationship to 5907 owner entities that are contained inside an excel sheet I converted to a table. So each polygon represents a lease record ...
1
vote
0answers
40 views

Coverting TIFF file by Raster Calculator in QGIS

My ultimate goal is same as here Here is my steps: The image is created using Python and saved as PNG format: Import the image into QGIS using Georeferencing tool and saved as TIFF: ...
1
vote
0answers
33 views

Automatic geometry creation [duplicate]

I am currently slowly mapping field boundaries of old agriculture map areas using QGIS. Has anyone designed a magic plugin or method so that the black outlines of the boundaries are automatically ...
2
votes
3answers
105 views

Creation of polygon in the gap between two existing polygons

If there is a gap between two polygons is it possible to fill it? Much like what happens using the hatch function in AutoCAD. The output would be a new polygon in place of the gap.
1
vote
1answer
40 views

How do you calculate drive times around a point? [duplicate]

For example, if I have an Airport point and I want to create a 30-minute Drive Times buffer polygon around it, how would I do that? I'm currently using QGIS 3.4.4.
0
votes
0answers
27 views

Making polygons from coordinates

I am working on a project regarding the mapping of solar parks in the rural areas of my country, unfortunately, the data that I have, are in paper and printed topographic maps. So I need to make ...
0
votes
1answer
43 views

Automatic polygonising in QGIS? [duplicate]

I have multiple points and I need to create polygons that consist specific amount of points. How could i do this?
1
vote
1answer
290 views

Draw a polygon with specified edge length in QGIS Madeira

I am looking for a possibiliy to draw a polygon with specified edge length in QGIS Madeira. I already checked further Threads belonging to this question, but all answers refer to PlugIns which are not ...
1
vote
1answer
69 views

Why can't I buffer polygons in ArcGIS Pro?

I've created a polygon by merging several polygons from the same layer using the merge option under Edit menu. Now I cannot buffer the resulting polygon. I tried repair geometry it didn't help. I'm ...
0
votes
0answers
112 views

PAEK smoothing tolerance

How should one determine what the Polynomial Approximation with Exponential Kernel smoothing tolerance should be when smoothing a shapefile using the Smooth polygon tool?
4
votes
1answer
105 views

Automatic polygon placement from trail

I have a shapefile with >300 points that correspond to the points where vegetation survey plots were carried out 10m from the road on both sides. Plots have the dimensions 20mx50m. The attributes ...
0
votes
1answer
74 views

How to create quadralinear polygons around a set of points

I have a point shapefile of locations of trees in an orchard that are almost, but not quite, on a grid. The orchard is divided into plots made up of groups of trees that either in a rectangle of rows ...
1
vote
1answer
68 views

Creating polygon from lines, using the lines' attributes?

I'm trying to transform lines into polygons with the attributes. The lines are from a dwg file. I tried to use "feature to polygons" but doesn't preserve the attribute. I tries to transform lines to ...
3
votes
1answer
91 views

Why is my arcpy.Polygon changing how many vertices it has?

Using a Python script, we are pulling a list of polygon vertices from a web service to build a polygon and insert it into our SDE. The problem steps are happening when we're making an arcpy.Polygon ...
1
vote
2answers
745 views

Creating shapefile of S2 cells for given level

I want to create a shapefile that has polygons matching with the outlines of the S2 cells (http://s2geometry.io/) of a given level, within a certain bounding box. Roughly what this website does: ...
1
vote
1answer
384 views

How to create a polygon from a Print Composer or Print Layout map extent in QGIS?

How do you create a polygon from a QGIS Print Composer or Print Layout map extent (i.e. a polygon that is the exact area shown in a map within a print composer/layout)? Ultimately I would like to do ...
0
votes
1answer
113 views

Creating Polygons from Points in Carto

Using Carto, I am trying to create shapefiles of regions using points(Link to Dataset in Carto ) with a shared column value to group by. I've included 3 photographs. 1st photograph of the points ...
2
votes
0answers
32 views

Processing tool to fill all voids within a lines layer

I'm trying to convert a lines layer from Ordnance Survey which is made up of field boundaries, river banks, woodland boundaries and houses etc into a polygon layer, but only 'polygonise' the fields. ...
0
votes
1answer
287 views

Generate grid for specific scale in QGIS

I have a rather large map that I want to break down into smaller parts, or sheets. So I'm going to use the 'atlas' feature of QGIS Print Layouts. My layers in QGIS have a CRS of GDA94 (degrees), where ...
1
vote
1answer
835 views

JTS: generate a polygon geometry from line geomtry

I have a line and I wish to convert it to a polygon. The point is this line is NOT a ring it's an straight Line. And I want to use an specific width to extend line horizontally and create a polygon. ...
1
vote
1answer
1k views

Editing polygon in QGIS

I have a shapefile of polygons. What I want to do is take some areas and discard others. For example, I have a map of USA (shapefile). I want to take California only and make another shapefile. How ...
1
vote
2answers
425 views

Create rectangular polygon with dimensions in km centered on points in point layer

Given a point layer in QGIS 3.03, I am attempting to create a second layer of square polygons with a specified length of x kilometers whose centers are the points in the first layer. What would be ...
0
votes
0answers
109 views

From Kernel Density to a polygon that covers 80 % of points

I have a set of occurrences as points in a district. I used Kernel Density tool, to show the areas of various densities. I also want to create one polygon that covers X % of points. I've tried the ...
0
votes
1answer
91 views

Creating donut polygon in existing polygon using ArcGIS Desktop?

I am tracing polygons in ArcGIS with the help of editor tool but I need to exclude some areas from the existing polygons. How can I make it? I went through google, but instructions provided are ...
1
vote
0answers
318 views

Creating multi-country Google Maps API Polygon?

I'm working on an embedded interactive map using the Google Maps API. I need to show several "regions" that each contain some neighboring countries. For instance one of the regions is the countries of ...
3
votes
1answer
101 views

Disappearing Field Boundaries in ArcMap?

I am creating some polygon features that map farm field boundaries. After creating about 3-4 of them, I noticed that the first one I created disappears from the Map View. If I look at the attributes ...
-1
votes
1answer
332 views

Edit kml polygons pop-up to open it all when click on one of that using Google Earth

I have a couple of polygons in kml format and I want to open it in Google Earth. That what I need is when I click on one polygon than all other polygon pop-ups of same owner (or any unique field for ...
2
votes
1answer
977 views

Convert multiple lines into a polygon in QGIS

I am working on a huge CAD-map that I am supposed to convert into a GIS map. Currently I am trying to convert the symbols used for survey points (see below) into polygons, of which I could calculate a ...
0
votes
1answer
29 views

Automatically generate polygons based on conditions

Suppose you have two rasters. I would like to create a number of polygons such that each pixel belonging to each polygon fulfilsthe two conditions. E.g. condition1: rastera > x; condition2: ...
0
votes
1answer
109 views

grid data to contours

I have a dataset containing a grid of geo-referenced points that have a corresponding value. I'd like to create geographical areas (polygons) at certain levels within the grid, basically combining all ...
1
vote
1answer
82 views

Unable to draw multiple polygons using Shapefile layer

I am new to QGIS. I would like to draw a boundary and a few polygons (to represent buildings or concreted areas) on a map for planning out a farm soil delineation map (with some irrigation). I was ...
1
vote
2answers
2k views

Creating Polygons using Google Earth Pro?

I am brand new to Google Earth Pro, and in walking through the tutorials, my polygons don't work as they're supposed to. I follow all of the instructions from the Google Earth lessons, but nothing ...
0
votes
0answers
205 views

Calculating the acreage of a created polygon in ArcGIS Collector

I recently set up an app using ArcGIS Collector. I have a editable polygon shapefile that has an acreage field. It allows me to create a new polygon, but requires that I enter in the acreage field ...
1
vote
1answer
97 views

Create Pseudo Drilling Spacing Units - Polygon inside another polygon from its boundaries

I am trying to create pseudo Drilling Spacing Units. That corresponded with the section, township and range that they are generated from. I am working with Sections from the Land grid in Oklahoma; ...
2
votes
1answer
251 views

Creating vertical polygons in ArcGIS Desktop?

I am trying to convert vertical line (cross-section) features to the polygon, but all regular ArcGIS tools (e.g. Feature to Polygon) that I applied can't convert vertical lines to vertical polygons. ...
1
vote
0answers
594 views

Create Polygon - How do I bring a table in with Lat/long

I found the below code for creating a polygon. I know what a polygon is, but I'm confused about the code. I have my polygon points defined, but where do I bring my table in to match to the polygon lat/...
1
vote
0answers
522 views

Polygon doesn't appear in QGIS

I have created a polygon shapefile and the nodes can be seen in edit mode: and here is the symbology as I have tried to set it (I wanted no fill and red outline): The polygon doesn't appear on the ...
1
vote
0answers
43 views

How to draw an exact polygon with exact messurements

I want to draw a polygons on a Google satellite map. I made a Shapefile to work in, but I can't find the right tool to make a polygon that is exact 20 x 20 or 40 x 10 or some other measure. As I start ...
1
vote
1answer
514 views

Why does polygon disappear in QGIS?

I am new to the whole QGIS platform but have worked out adding layers, shapefiles, polygons etc. and the rest of the simple stuff. But just now the polygon I am trying to add disappears when I right ...
6
votes
1answer
163 views

split regular polygons in regular sub-polygons

In QGIS, I have a layer containing 62 equal-sized, quadratic polygons: I want to split each polygon regularly into 9 quadratic sub-polygons and tried the polygon divider tool. Results are fine for ...
8
votes
3answers
345 views

Cutting Polygons in QGIS at a specific distance from a feature in another layer

I would like to be able to cut polygons such as the one below, in QGIS, at a set distance either side of a specified feature on another layer, in this case a footpath line from OS Mastermap. In this ...
11
votes
1answer
471 views

Creating a Radial Sector Overlay in QGIS

I need to create a sector grid radiating out from a point of interest. Here is an example that I laboriously put together by hand: I have found a couple of similar solutions in How to generate ...
1
vote
0answers
54 views

Raster to Polygon tool results in reduced area

I have a large raster dataset within a file geodatabase (FGDBR format raster) which I have converted to polygon using the 'Raster to Polygon' tool. Cell size of original raster = 25m. Cell size of ...
2
votes
1answer
395 views

QGIS - Creating a new polygon layer from the space between other layers

I wonder if it´s possible with QGIS (2.18) to create a new polygon shapefile directly from the space between Another 2 different polygon layers: What I would like to do is to fill the gap between the ...
1
vote
1answer
230 views

Adjust points based on offset angle

I have a centre point XY. I have a series of measurements around the point in xy offsets in centemetres from XY. I need to create a polygon of these measurements. With the first measurement x is ...