Process of creating geometric polygon features.

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30 views

Making an office floor plan in QGIS [closed]

I don't know if this is possible in QGIS but I want to try to re-create this floorplan using shapefiles, it needs to be the exact same as the measurements shown in the image. If possible I need to ...
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1answer
38 views

Need help making polygons from lines in QGIS

I am trying make a layer of buildings, divided into apartments, by making polygons from crossing & intersecting lines in QGIS. When I use the vector/geometry tools/lines to polygons tool, I get ...
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1answer
30 views

Convert Parallel Polylines (edges of pavement) to Polygons

I would like to find a way to convert an Edge of Pavement layer into polygons that would represent the total paved area. It's a large shapefile, covering some 100 sq miles or so, so doing anything ...
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0answers
20 views

Lines > Polygon artifacts

I am trying to make polygons from a set of boundaries from an SVG file with closed polylines I downloaded off wikipedia. 1) convert SVG to DXF via Inkscape 2) import into QGIS (shows polyline data) ...
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3answers
85 views

Cut polygon into new polygons using lines in ArcGIS

I'm new to GIS and I work with ArcMap. I have a layer with an orthophoto of a graveyard. On top of that, a layer with an old scanned map of the same area showing all graves. I would like to make a ...
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0answers
48 views

How to create a JTS geometry with holes and islands?

I have a JTS multipolygon geometry created by an Polygon array: multipolygon = gf.createMultiPolygon(this.polygons.toArray(new Polygon[this.polygons.size()])); Those polygons can describe holes or ...
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1answer
72 views

How to create empty polygon shapefiles with the same field names using python?

I'm new to python scripting in GIS and I have a list with species names, for every species in the list I want to create an empty polygon shapefile with the same fields inside the attribute. I read How ...
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29 views

Splitting up a single polygon into many polygons of equal point count

I have point data split into 15 different values and want to split up the (green) polygon into a number of smaller polygons each containing the same number of points so that I can make a chloropleth ...
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1answer
172 views

Formula to convert from WGS 84 / UTM Zone 34N to WGS 84?

Can anyone help me with the formula for converting from WGS 84 / UTM Zone 34N to World Geodetic System? My problem is I want to represent some properties (polygons) in some kind of a map (image). I ...
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0answers
47 views

Creating a single layer of polygons from a point layer

I have a csv file of lats and lons for points that represent the vertices of parcels of land. I want to create a polygon for each set of specific points within the csv and then create one unified ...
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40 views

Complexity of US 5-Digit Zip Code Boundaries from Scratch?

Does anyone have any idea how difficult it would be to create 5-digit zip code boundaries from scratch? Let's suppose you start with a good outline of the US. Where would you source the fundamental ...
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19 views

Defining bays as polygons using shapefile of Scottish coast?

I am interested in determining bays from around the coastline of Scotland. Ideally what I want to end up with is a number of polygons defining each bay using a shapefile of the Scottish coast. The ...
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53 views

Drawing boundaries between discrete features based on attribute values in ArcGIS for Desktop?

There is a point feature class with a certain numeric attribute (let us say, populated places with population). I wonder if there is, in ArcGIS, a way to draw polygons such that the sum of the ...
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0answers
28 views

Get next point horizontally and vertically

I am working on a map application. We have to draw polygons for different sections. Each section is either a square or a rectangle. Data that I have has less than 4 coordinate points, insufficient to ...
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1answer
48 views

How to draw a polygon between a number of polygons automatically

The weight “empty” area which is bounded by the orange boundary should represent a land use “Roads” so I should fill it with polygons. Now my question is how to fill these empty areas with polygons ...
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0answers
56 views

For every point create a wedge

How does one create a wedge polygon from a point? If I have 2000 points, I want each to have a wedge starting at each point with each point having a defined azimuth that the wedge points toward. That ...
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0answers
22 views

Error adding feature to centroids in QGIS [closed]

I want to map forest stands. I have the compartments as centroids and I am trying to add a feature by snapping to them and creating polygons. Each time I click, however, it displays a box titled ...
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23 views

how to create shapes for each node in network based on azimuth [duplicate]

I am new to QGIS. (I used Esri Arc more than 10 years ago). I have several thousand points on a map. Each point has an associated azimuth it points and a variable wedge it covers; ie it points at an ...
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1answer
76 views

Polygons not showing in ArcGIS for Desktop?

I am using ArcGIS 10.2. I have used the following procedure to creat polygon: 'Add XY data' to create points 'XY to line' to create line (but I could not see the lines) 'feature to polygon' to ...
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1answer
38 views

Fill larger polygon empty space with closest subset of polygons

Looking for an ArcGIS or QGIS solution. I need to divide up the space of the large single green polygon. Each new polygon would represent "nearness" to the purple polygons and have the ID of the ...
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1answer
127 views

Creating polygons layer from point layer with conveks buffer

I have a point layer of >750000 points representing dwellings with district heating. Now, I want to create polygons for every n of points with a distance of n meters to the next point. I have a ...
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3answers
203 views

Creating polygon from 2 txt files (Parent ID + Coordinates)

Here is what I am trying to do: I want to create polygons based on two separate text files: the first one (as parents) lists the Polygon ID (ID_el) and three to four Points ID (IDpt1, IDpt2, IDpt3..) ...
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1answer
86 views

How to construct semi-circle-shaped areas of confidence?

We have polygon maps of river-bottom type and are interested in determining if particular bottom-feeding fish prefer one bottom type over another. We locate an acoustically tagged fish at a point in ...
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2answers
224 views

Zipcode to Polygon/Boundry

Is there any API out there which can give me Polygon value for a zipcode? I really thought that it would be fairly easy for me given the number of Maps APIs out there. Either Google Maps API or ...
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1answer
39 views

Is there any way to know if a polygon is part of another bigger polygon(s) in SQL server?

Basicaly, what I am trying to do is we have a lot of geographical containers like territories, sub-territories etc. and the boundaries of each keep on changing all the times and I have to store the ...
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3answers
943 views

How to subtract polygons from polygon?

I have two polygon layers, one is green that represents all non-public right-of-way land. I have another polygon that is just a circle with a specified radius. I would like my output to be a polygon ...
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2answers
249 views

Drawing BTS sectors in GSM?

I'm very new to Mapbasic. I tried to make a short code to draw some BTS in GSM but I can't do thant (over 1 month). I have a table with these column: Sitename, Lon, Lat, Azi, Beam, Dist. Can ...
2
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1answer
69 views

Creating a 5x5 poylgon in ArcGIS with a predetermined center with coordinates X, Y [duplicate]

I need to build a polygon (5x5 km) centered on a coordinate X,Y. I want to use this 5x5 square for an eventual clip. How should I proceed in ArcMap?
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90 views

How to split a polygon into quadrants in R/Qgis?

I am solving the same problem as How to split a polygon into quadrants?, except that I am looking for a solution in R or QGis. So I have a polygon layer shapefile, which is unfortunatelly not exactly ...
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2answers
69 views

way/tool to automatically generate polygons on map knowing polygon width and height and spacing

I need to create a large number of polygons (say 1000) on a georeferenced mosaic (from aerial photographies). I know polygons' height and width, and I know the spacing between them. I can also provide ...
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0answers
34 views

Creating polygon with attributes using ArcGIS Desktop? [closed]

I'm new of the use of arcGIS. I have xy data that descibe a polygon. But when I use the tool "point to line" I lost all attributes. There is a way to create a polygon with attributes. I try to explain ...
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1answer
51 views

Defining polygons based on thickness maps using ArcGIS for Desktop? [closed]

I want to find and create polygons that demarcates three different inflection points in a thickness raster: where the thickness start to increase, where the thickness is at its max and where it starts ...
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95 views

Dividing a polygon into certain areas (open source solution preferred)

I have a polygon with an area of 50.000m². Now i want to devide this area in two polygons of different areas with a line layer. The left polygon should have an area of 30.000m² and the right polygon ...
2
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1answer
158 views

Generate territory polygon from sets of points

I'm looking for a simple way to generate contiguous "territories" from sets of points. Say, points A, B and C are in territory 1, and D, E and F are in territory 2, then generate polygons that lie ...
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0answers
68 views

Geoserver does not render polygon properly

I am trying to a get polygon layer from CSV file. I chose to do it via rasterization and polygonization in QGIS, howerver, Geoserver has problems to correctly render some polygons. This is how the ...
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0answers
53 views

Network Analyst Add City Boundary as Polygon Restriction

I have a network I am trying to create but am finding the service area polygon I create are "leaking" outside of the city boundary. I was curious if there was a way to add the polygon as a restriction ...
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0answers
40 views

How to find the the boundary co-ordinates from a given set of coordiantes? [duplicate]

How to find the the boundary co-ordinates from a given set of co-ordiantes? I understand that this question asked previously and answered here How to find the boundary co-ordinates from a given set ...
2
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2answers
99 views

QGIS - Create equal length polygon along polyline

How can I create a series of polygons along a line? I need to assess the density of a number of targets along a line within a corridor. I have tried the following: creating a buffer, using the ...
4
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2answers
344 views

Best way to get a bounding polygon of all features in a file .gdb

I have an arcpy script that dynamically creates a filegeodatabase and its featureclasses from uploaded spatial data, currently point and line features and possibly polygons in the future. I am ...
3
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2answers
232 views

Can't transform lines to polygons

I have a similar question to: How to join lines in QGIS for later using "lines to poly"? I have a line shapefile that I wish to transform into a polygon shapefile. After making some ...
2
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0answers
110 views

How to extract polygons from a road network?

I need to extract faces (or polygons) from my road network and calculate their areas. I mainly use Arcpy packages but even if you know it in QGIS APIs, I'd appreciate if you'd share it with me. If it ...
2
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1answer
460 views

Polygon Between Contour Line

I have a contour generated from SRTM, How to fill the space between that contour with polygon (for all part) but it generates field in attribute table automaticaly, example in image above between ...
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2answers
114 views

Creating counties in QGIS

I have a raster map (a photocopy I took from an Atlas), and a vector map of the UK. The raster map shows pre-1890 Scottish county borders. I have geocoded the map so that the raster borders overlap ...
2
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2answers
7k views

ArcGIS: Create polygon using file containing point coordinates

I have a text file containing the projected coordinates of the points that define a single polygon. The X, Y coordinates are separated by Tab Is there a tool in ArcGIS similar to "Add X,Y Data" in ...
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3answers
452 views

How can I insert a bounding box or polygon in a PostGIS geometry field?

I have a field in my table called 'geometry' that was created thus: CREATE TABLE "public"."sites" ( "id" int8 DEFAULT nextval('sites_id_seq' :: regclass) NOT NULL, #... A few MORE fields ...
2
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0answers
68 views

Weird-looking France after OSM import with osm2pgsql

After importing france-latest.osm from Geofabrik, using osm2pgsql, it seems that the polygon attributed to Metropolitan France (osm_id = 1403916) is a bit odd: I'm far to be a geography expert, but ...
2
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1answer
174 views

Dynamically drawing a polygon around another shapefile, ArcGIS 10.2

Let's say I have a vegetation raster that indicates the density of forest all over the world. I also have a shapefile that contains the admin boundaries of each country in the world. The easy part is ...
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1answer
118 views

Raster domain output polygon has is an empty feature class. Shape_Length and Shape_Area = 0

I am trying to convert a 32-bit floating point raster with 205289 columns and 120615 rows to a polygon using Raster Domain. It creates a feature class that does not contain any polygon. There is a ...
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1answer
63 views

Creating contiguous / adjacent ellipses

I've only just started using drawing tools in ArcGIS, and have the following question I haven't found the answer to online. Is there a way of taking a drawn ellipse (at a slight angle) and adding say ...
0
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1answer
58 views

Adding custom shapes to a new shapefile

I am using ArcGIS 10.1 and I drew a rectangular shape to designate a junction on a map and i would like to add that to a new shapefile. Could you please give me some ideas.