On a map, a closed shape defined by a connected sequence of x,y coordinate pairs, where the first and last coordinate pair are the same and all other pairs are unique.

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1
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2answers
60 views

How can I build a grid of equal square polygons in ArcGIS 10?

Not having them depend on decimal degrees, but on a certain distance. When I use a tool it asks me the length of the cell in degrees, but I want all sides of every cell to be equal and with degrees ...
1
vote
0answers
18 views

QGIS-I have 37 polygons, can I bulk create 2 other sets of 37 that are 1 px larger all the way round and 1px smaller

I have 37 polygons covering a Lakes spatial extent at a particular point in time. I need to bulk create 2 sets of polygons. One 1 px larger all the way around and one 1px smaller to calculate the area ...
1
vote
1answer
26 views

How to auto Correct Polygons that are not drawn correctly?

I was part of a project recently where handheld GPSs were used to collect vertices of parcels. After plotting the points using 'P2One' plugin in QGIS I found out that some of the polygons were twisted ...
3
votes
1answer
62 views

Rule based polygon fill in QGIS?

I'm really quite new to QGIS, I want to style polygons fill with raster imagws based on a attribute contained in the property table. What do I have to write in the description in order to get for ...
3
votes
0answers
53 views

Find Distance Between Two Polygons

Given two polygons (point, line, or up to 8 vertices) I need to be able to calculate the shortest distance between them via code I write or a call to an API (I haven't been able to find one that does ...
0
votes
1answer
66 views

Inverted lat lon on drawn polygons in Openlayers 3

I am working on a map in openlayers 3 with geoserver I display the layers as WFS and I added the draw and modify interactions, but when I save the drawn polygons the coordinates of the newly drawn ...
0
votes
0answers
10 views

Allocating premises between postcode polygons and telephone exchange area polygons in QGIS?

I have telephone exchange areas as one polygon layer and postcode (codepoint) polygons as another. The postcode polygons have the number of premises in each postcode as a field. I want to estimate the ...
0
votes
0answers
10 views

MSL/AGL bounds checking in PostGIS for Line/Polygon Intersection

I have a table with Polygons and columns defining an optional upper and lower altitudes bounds and altitude type. The Type can be MSL, AGL, or NULL, if unbounded, and can be set separately for upper ...
1
vote
0answers
20 views

scale polygon in Qgis [duplicate]

The task is to scale a polygon in QGIS. The procedure is performed tracing the polygon and then apply a scaling factor ( the factor used is " Distance on the ground" / " Distance on map " ) . Both ...
1
vote
0answers
23 views

SRIDs do not match for the two geometries in oracle spatial

I am trying to resolve where some points from Point Geometry lying outside the Polygon geometry. I want to filter those points which are lying outside the polygon geometry. I am getting error where ...
2
votes
2answers
71 views

OpenLayers 3 / Cesium polygon projection issue

I am using OpenLayers 3 and Cesium (via ol3-cesium). I have created a few rectangles (using a MultiPolygon) stacked on top of each other. Whereas in OpenLayers the rendering (left) is as expected, ...
3
votes
2answers
627 views

Area in KM from Polygon of coordinates

I have polygons from coordinates in (python shapely) that looks like this POLYGON ((24.8085317 46.8512821, 24.7986952 46.8574619, 24.8088238 46.8664741, 24.8155239 46.8576335, 24.8085317 46.8512821)) ...
4
votes
5answers
35k views

How to connect points with a polyline in ArcMap 10?

I have a layer containing a few hundred points representing a survey track. The points are laid out in chronological order in the corresponding attribute table. How can I have ArcMap 10 automatically ...
2
votes
1answer
148 views

Constructing simple zip code polygon map in CartoDB?

I'm new to using CartoDB. I want to produce a map that depicts multiple layers, the first of which is simple zip code polygons (i.e. polygons outlining an area defined by a postal zip code). I ...
4
votes
3answers
68 views

Convert .csv with polygon geometry to .shp QGIS

Working on a Mac in QGI 2.12, I have a csv file with polygon geometry coordinates that I would like to save to a shapefile. It displays fine as a csv. However, when I try to use "save as," I get the ...
1
vote
0answers
29 views

Polygons created with R are corrupted when imported into ArcMAP

I created some polygons using R and to get a better visualization and some other stuff I need to import those into ArcMap. However, when I imported the polygons I realized there are some holes in some ...
2
votes
0answers
27 views

PyQGIS: intersection of one node layer with two polygon layers

I´m new with the use of PyQGIS and I´m working in a problem applied to a water supply systems modelling, where I need to distribute the water demand in about 5000 nodes (network junctions). I´m ...
4
votes
4answers
152 views

Google Earth Polygon surface area to follow the curvature of the earth model

Question: When drawing a polygon in Google Earth with latitude, longitude and elevation values at each node, how do you ensure that the surface area of the polygon also represents the desired ...
0
votes
1answer
56 views

Google Earth: Circular polygons that follow earth curvature

I'd like to draw filled circles in Google Earth which follow the curvature of the earth, i.e. for 1000ft altitude, not only the circle's edge but also the center is required to be 1000ft above ...
2
votes
2answers
277 views

Mapping Russia - Int'l dateline splitting polygon

I am having the issue where the International Dateline is splitting a polygon I am working with. I have a layer of the "Federal Districts" of Russia, and the eastern most federal district is being "...
0
votes
1answer
26 views

Triangulation method to create multipatch objects (decomposition of polygon surfaces)

Which triangulation method or algorithm does arcscene use to create multipatch parts (patches) as you see in the attaching picture. The algorith decompose the polygon area into a set of triangles ...
0
votes
1answer
20 views

Cut Tool or Process to mimic cutting in a “cookie cutter” like fashion

Say I have a sidewalk polygon, and on that segment of sidewalk I have 5 tree grates that I want to cut out of the sidewalk polygon. Is there a tool or an easy process that I could cut out one tree ...
0
votes
0answers
20 views

Why do area calculations of OSM polygon shapefiles return negative values in ArcMap?

Whenever I tried to calculate the area of polygon shapefiles (OSM, Geofabrik) part of the polygons have negative values. All values appear to be right except the fact that around half of them are ...
0
votes
0answers
16 views

Loading Data into Vector Layer Polygon

My first layer is a map. My second layer consists of points: bars with GPS coordinates (.cvs file). My third layer consists polygons, creating different area's for the bars. So, the points of the ...
2
votes
1answer
45 views

How can I calculate the percent of a raster cell covered by a polygon?

First, I am going to try and intersect a raster and a polygon shapefile. I'm not 100% sure how to do this (or if I need to do this for the next step), so if you have any suggestions please let me know!...
14
votes
10answers
32k views

Get boundary of raster image as polygon in ArcGIS Desktop?

I have a rectangular raster image in ArcGIS. My question is: how can I produce a polygon which is just the extent of the raster image? That is, I want to have a polygon layer with a single ...
32
votes
9answers
33k views

Removing small spaces (slivers) between polygons?

I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces (slivers) between polygons where the polygons should be touching. How ...
3
votes
0answers
43 views

Can I reorder the points in a GEOS LineString?

Using libgeos, when I buffer() a polygon and then getExteriorRing() [to make a slightly smaller outline copy of the polygon just inside the original], it seems that which point on the new geometry is ...
0
votes
1answer
50 views

How to calculate distance from point to nearest polygoin via road network (polyline) ARCMap 10.3.1

Using ArcMap, is it possible calculate distance from a postcode (point) to nearest polygon using a road network layer (polyline)? As opposed to just calculating Euclidean distance?
1
vote
1answer
143 views

How to reclassify raster data that falls within a polygon

Thansk for your response Okay so I will reword my question more clearly I'm currently using ArcGIS 10. My task is to map forest cover with the image classification tool. The problem is some of the ...
1
vote
0answers
19 views

Why does connected polyline (KML file) appear unconnect in arcmap as layer?

I created polygone in google earth and imported it to arcmap as layer. All things are OK but when I converted polygon to polyline, there some parts of polyline has not shown although its vertices ...
0
votes
1answer
41 views

Finding neighbors for non adjacent polygons in R [closed]

I'm looking for a method or function in r-project that create a neighborhood matrix from a group of polygons that don't touch each other, like polygons of set of blocks separated by streets in a town. ...
1
vote
3answers
72 views

Comparing size between polygons in different UTM zones

I am going to compare size of different areas in Europe in different UTM zones. The areas I'm comparing are quite small (around 35-50 km2) and I was wondering how to do this the best way? Can I draw a ...
0
votes
0answers
39 views

OpenLayer WMS Polygon Fill color dynamically

i am new to OpenLayer Geoserver and PostGIS. I want to color my WMS Polygon Layer which has multiple polygon in different color based on some value. Is this possible with wms or wfs. Color for polygon ...
1
vote
1answer
27 views

Storing GML Polygon in PostGIS 2, ERROR: unknown spatial reference system

I am receiving GML as part of a larger XML message. When I receive the XML it is unmarshalled to Java objects. I have no rights to alter the schemas or the generated Java code. Therefore, I later have ...
4
votes
2answers
95 views

How to place only one symbol on the centroid of a multipart polygon?

I am using QGIS version 2.14.1 (Essen). I would like to place symbols on the centroids of my data. The problem is that some of my data has multi-part polygons, which means it places the symbol at the ...
2
votes
0answers
27 views

How do I merge a point attribute table to a polygon attribute table in QGIS or GRASS?

I have a point layer containing the following data: I want the following polygon areas to be added to the point attribute table as all the points occur inside the various features of the polygon ...
2
votes
2answers
157 views

What is the difference between Polygon To Line and Feature To Line in ArcGIS?

What is the difference between Polygon To Line and Feature To Line in ArcGIS? Is feature to line a more abstract way such that it takes in not only polygon but like dots and other feature classes also?...
1
vote
1answer
24 views

ArcGIS: segmenting buffer based on polygon corners

I have hundreds of square polygons which I've created a single continuous buffer around the polygons. What I'd like to try and do is try and break this buffer down into segments based on the corners ...
5
votes
2answers
145 views

Are there any multipolygons in my shapefile?

In QGIS 2.x, is there a simple way to determine if a polygons layer contains multipolygon geometries and if yes: which are these features?
0
votes
2answers
2k views

How to export to all points within Leaflet polygon?

Is it possible to export all points within a polygon drawn using Leaflet? (http://leaflet.github.io/Leaflet.draw/).
4
votes
1answer
52 views

Change feature class from ESRI native geometry to SQL Server geography

Original question: I have found a lot of documentation on importing and using query layers from SQL Server into ArcCatalog/ArcMap/etc. However, when you change the projection of a feature class or use ...
3
votes
2answers
72 views

Polygon shapefile has irregularities when viewed in ArcMap?

i am using ArcGIS 10.4 for Desktop and when i try loading my shapefiles into the arcmaps it shows extra incorrect lines in my polygon shapefile is there anyway to fix this inconsistencies ...
2
votes
0answers
42 views

Filtering Small Areas of Shapefiles Using R

I'm trying to use the method proposed by the @ialm in the Question "How to speed up the plotting of polygons in R?" There, he loads the maps using getData from the raster package, I tested and it ...
0
votes
0answers
21 views

Percent overlaying [duplicate]

I have a raster dataset of points and a polygon features. The two are over the same area and I am trying to find the percent of the raster that overlaps the polygon features. I have tried clip, ...
0
votes
1answer
43 views

Intersection of a raster and polygon in ArcGIS 10.3

I have two data sets one raster and one polygon. I am interested to see learning the area where the two overlap. I was thinking that I could use the intersect function, but since one of the layers are ...
5
votes
2answers
133 views

How to sum attribute values for areas where multiple polgons overlap?

I have one shapefile with many polygons (at least 100). Each polygon has a value. Almost all these polygons overlap with each other. I want to sum the values of the polygons in the overlappings depend ...
0
votes
1answer
25 views

Identifying the closest polygon to a point dataset

I have two large data sets one point and one polygon. What I was looking to do was identify which polygon is closest to each point. Hopefully I was looking for a automated process as the point data ...
1
vote
2answers
49 views

Animating polygon style over time in QGIS?

I have a shapefile, consisting of polygons. I can join a layer to a database file, and use an attribute (database value) to "style" (color in) the polygons to give me a visual representation of the ...
1
vote
1answer
51 views

“Direction/Length” Tool not working with Polygons in ArcMap 10.3

My "Direction/Length" right-click option is not working when trying to draw a polygon. I start a shape by dropping a single vertex, right-clicking and choosing "Direction/Length". I enter in the ...