Questions tagged [shape-area]

SHAPE_Area is a system field in a geodatabase polygon feature class that holds the geometric property 'area' for a shape. For the general concept of area, use the area tag.

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Difference in ONS area and area calculation in GIS-software

I have an official shapefile from the ONS (Office for National Statistics) in the BNG (British National Grid) projection. It has an st_areaha attribute column - I understand this is the area in ...
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23 views

Lost/disappeared shape_length an shape_area fields

I have a vast database which includes a shape length and shape area field. One day, after doing some fc to fc layers from said feature class, I opened the attribute table and the shape length and ...
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ArcGIS Pro - need to import 3D model then create polygons on 3D model to measure sections for surface area

I am generally new to ArcGIS Pro. I am working on a project using photogrammetry where I am reconstructing 3D models and trying to measure the surface area of different sections of the models. Maybe I ...
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43 views

Selecting polygons based on their shape

I have a polygon shapefile consisting of a lot of irregular shapes. I would like to select longer shape polygons like the one inside the red circle in the image. Is there any tool or algorithm which ...
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1answer
76 views

Polygon area calculation discrepancies

I use the following code to calculate the areas of a multi-polygon shapefile. However, to validate these results, I calculate the polygon’ areas directly in table attribute by creating a new field and ...
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1answer
66 views

Counting points creating polygon with ArcMap?

I am using ArcGIS Desktop 10.5. In land consolidation projects, to determine success of the project, we use shape indices. For this purpose to calculate shape indices, I need to know how many points ...
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1answer
459 views

Calculating the proportion of area drawn over boundary file

I'm working with agriculture area data in MapInfo. I downloaded the boundary file from StatCan (call it STC), and a freehand draw tool downloaded here https://tinyurl.com/ydarsnq8 (call it DRW) I can ...
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51 views

Equal area projection

In which projection I should project a polygon of a country to get the right area in the attribute table without a distortion? For example greenland
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99 views

Sum area of multiple polygons of same layer that are all contained within different polygon

I have multiple polygons of the same layer that are all contained within another polygon of a different layer (please see the example below- picture is of Great Barrier Island and surrounding islands, ...
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1answer
417 views

Which projected coordinate system for whole China?

I want to project data of China. I'm not concerned with trying to preserve areal or directional relationships but preserving distances would be nice. Does such a coordinate system exist?
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4answers
1k views

Merge overlapping polygons (same shapefile) in ArcGIS without losing polygon area?

How can I merge overlapping polygons (same shapefile) in ArcGIS 10.3 without losing polygon area, i.e. the total area of the new, merged polygon should equal the area of all individual polygons ...
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1answer
1k views

Area calculation in QGIS done two different ways?

It seems that there are at least two different ways to calculate the area of a polygon in QGIS using Python: 1) area = feature.geometry().area() 2) d = QgsDistanceArea() area_v2 = d.measurePolygon(...
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1answer
675 views

Intersect automatically updating Shape_Area and Shape_Length in ArcGIS Desktop?

I am making a model in ModelBuilder in ArcGIS Desktop 10.1. I am using Intersect tool. I need to calculate the Shape_Area and Shape_Length of my polygons (Projected Coordinate System, EPSG: 5514, S-...
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1answer
373 views

Calculating predominant value according to area within polygons using QGIS?

I am using QGIS 2.18.1 Las Palmas, in Windows 10, and that's the issue I want to clarify: I've got 2 polygon shapes. 1- One with river basins, and 2- other one with different levels of ...
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1answer
6k views

Calculate polygon area in QGIS 2.18

I'm trying to calculate a polygon area. This is the polygon and the attribute table: When i open field calculator and use the Geometry--> area$, the area result for ID 1 is (in squere meters) 1809477....
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3answers
150 views

Ranking values by shape area using ArcPy

I'm trying to make a script that performs the following: it creates a new field that will hold values based on size of the shape area (from 1 to end of table), basically ranking them. I have a few ...
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1answer
365 views

Calculate area intersected areas, problem [closed]

(I'm working in QuantamGIS) I intersected two layers creating a new layer. Within the attibute table of this new intersect layer i would like to calculate the new areas. However, it just doesn't ...
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1answer
94 views

Changed Projected Coordinate System back to original but, Shape_Area field is still off by about 55 SF

I recieved some GIS parcel data a little over a year ago. This data is the basis for the majority of my work. About a week ago I noticed that the Projected Coordinate System had somehow been converted ...
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1answer
342 views

Row.Value returns rounded SHAPE.area and SHAPE.len values?

I have created a VB.Net Add-In, and am using IRow to get the value of fields in tables in ArcMap to use in a query. But I am encountering a problem when getting the values of the SHAPE.area and ...
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2answers
1k views

Shape area is not updated when importing shapefile from QGIS to Esri Geodatabase

I made some holes (difference) in a shapefile with Q-GIS 2.2.0, than I imported the shapefile in ArcGIS 10.0 and I exported the shapefile to a feature class in a File Geodatabase. In the feature ...
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1answer
1k views

Determining Shape Area Field Name

I'm dealing with a varierty of spatial polygon files (shapefiles, file/personal gdb feature classes, sde feature classes (some with spatial views)) and depending on the file type, I get a mulittude of ...